EP0380727A1 - Appareil de distraction ou d'éducation produisant des sons - Google Patents

Appareil de distraction ou d'éducation produisant des sons Download PDF

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Publication number
EP0380727A1
EP0380727A1 EP89101687A EP89101687A EP0380727A1 EP 0380727 A1 EP0380727 A1 EP 0380727A1 EP 89101687 A EP89101687 A EP 89101687A EP 89101687 A EP89101687 A EP 89101687A EP 0380727 A1 EP0380727 A1 EP 0380727A1
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EP
European Patent Office
Prior art keywords
unit
memory unit
sound
static memory
portable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89101687A
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German (de)
English (en)
Inventor
Avish Jacob Weiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEGATONE Ltd
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MEGATONE Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MEGATONE Ltd filed Critical MEGATONE Ltd
Priority to EP89101687A priority Critical patent/EP0380727A1/fr
Publication of EP0380727A1 publication Critical patent/EP0380727A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H5/00—Musical or noise- producing devices for additional toy effects other than acoustical

Definitions

  • the present invention is related to that of my Patent Application No. 87630006.2 , filed January 20, 1987 , which describes various forms of apparatus for carrying out an amusement or educational function accompanied by audible sounds relating to an article, such as a book, toy or doll.
  • the apparatus described therein comprises a fixed memory unit to be attached to the article or at a fixed location in the vicinity thereof and including a read-only memory having digitally stored therein a recording of particular audible sounds relating to the article, and an output device.
  • the apparatus further includes a portable sound-producing unit to be carried by a user and means to convert a digital recording stored in the read-only memory of the memory unit to audible sounds.
  • the sound-producing unit further includes an input device which, when coupled to the output device of the memory unit, plays back the particular recording stored therein, and when coupled to the output device of another article having a different recording stored therein, plays back that recording.
  • an input device which, when coupled to the output device of the memory unit, plays back the particular recording stored therein, and when coupled to the output device of another article having a different recording stored therein, plays back that recording.
  • the present invention is directed to new applications of such apparatus.
  • Illustrative examples of such new applications as described herein include museums or exhibitions displaying, different articles each described in a message recorded in the memory unit; sales, manufacturing, and maintenance demonstrations for describing an article or the manner of its manufacture or maintenance; and geographical directories, providing directions for travelling to various destinations marked thereon.
  • museums or exhibitions displaying, different articles each described in a message recorded in the memory unit
  • sales, manufacturing, and maintenance demonstrations for describing an article or the manner of its manufacture or maintenance
  • geographical directories providing directions for travelling to various destinations marked thereon.
  • apparatus for carrying out an amusement or educational function accompanied by audible sounds relating to an article
  • said apparatus comprising: a static memory unit adapted to be located at a fixed location with respect to the article and including a read-only memory having digitally stored therein a recording of particular audible sounds relating to the article, and an output device; and a portable sound-­producing unit to be carried by a user and including an input device adapted to be coupled to the output device of the static memory unit and means to convert a digital recording stored in the read-only memory of the static memory unit to audible sounds; said sound-­producing unit further including a random-access memory for receiving the digital data stored in said static memory unit at a rate faster than the normal speech rate, and control means for playing-back the digital data or part of it received in said random-access-­memory at the normal speech rate.
  • the static memory unit is a passive unit, not having its own power supply; both the transfer of power from the portable sound-producing unit and the transfer of data from the memory unit are effected via the output and input devices.
  • the static memory unit is an active unit, having its own power supply; only the transfer of data from the memory unit to the portable sound-producing unit is effected via the output and input devices.
  • output device of the static memory unit and the input device of the portable sound-producing unit, are inductively-coupled devices, optically-coupled devices, or mechanically-coupled devices.
  • the invention is particularly useful for a museum or exhibition displaying a plurality of articles
  • the plurality of recordings stored in the read-only memory of the memory unit include a message for each of the articles.
  • the memory unit may include a plurality of read-only memories each including its respective output device, each read-only memory having digitally recorded therein a recording of the same message but in a different language.
  • the read-only memory unit may also have digitally stored video signals related to the article
  • the sound-­producing unit may include a visual display and means to display the video signals recorded in the read-only memory of the memory unit as a picture in the visual display.
  • a further application of the invention is described as a geographical directory, wherein the fixed memory unit includes a map having markings thereon indicating a reference location and the locations of a number of possible destinations with respect thereto, a read-only memory having digitally recorded therein a plurality of messages each providing directions for travelling from the reference location to one of said destinations; the apparatus further including selector means for selecting the recorded message for a selected destination.
  • the selector means may be of the map or on the portable unit.
  • the invention is illustrated in Fig. 1 as embodied in a museum or exhibition environment wherein displayed artworks or other articles on exhibition are described by recorded audio messages to be played back to the viewer.
  • the apparatus includes two basic units, namely: a static memory unit, generally designated 2, at a fixed location in the vicinity of the article displayed and containing a digitally-recorded message related to the article; and a portable sound-producing unit, generally designated 4, to be carried by the user and to be plugged into the static memory unit 2 for receiving the digitally-recorded message and for playing it back to the user.
  • the static memory units 2 is a passive unit and does not contain its power supply; rather, it contains only the electrical components for storing the message in digital form, for receiving energy from the portable unit, and for outputting the stored message via its output device 6.
  • the sound-producing unit 4, carried by the user, contains the power supply for both units. It also contains all the other components, including an input device 8 pluggable into the output device 6 of the memory unit 2 for receiving the recorded message and for playing it back to the user via a speaker, e.g., earphones 10.
  • the memory unit 2 contains a specific, digitally-recorded message related to its respective displayed article DA, while the sound-producing unit 4 is in the form of a standard device selectively pluggable into the memory unit 2 of any of the displayed articles in order to receive and play back the message for the respective article.
  • the memory unit 2 is illustrated as being carried in a guard rail 12 or the like in front of the respective displayed article DA; however, in order to avoid congestion in front of the displays it may be preferred to locate the memory units 2 of many displays away from the displays, such as at the entrance to the room or hall where such displays are found.
  • Fig. 2 diagrammatically illustrates the contents of the static memory unit 2 and the portable sound-producing unit 4;
  • Fig. 3 illustrates one example of a portable sound-producing unit which may be used;
  • Fig. 4 is a block diagram illustrating one example of electrical circuitry that may be used in both the static memory unit 2 and the portable sound-producing unit 4.
  • memory unit 2 includes circuitry, generally designated 20, for storing speech in compressed digitized form, and circuitry 22 for receiving electrical energy from the sound-producing unit 4 via one path 23, and for transferring data to the sound-producing unit 4 via a second path 24.
  • the portable sound-producing unit 4 carried by the user includes a power supply 25, such as batteries, and a circuit, generally designated 26, for transferring energy from its power supply to the memory unit 2 via path 23, and also for receiving data from the memory unit via path 24.
  • Sound-producing unit 4 further includes an intermediate memory 27 for storing the digital data received from memory unit 2 via data transfer path 24, and further circuitry 28 for synthesizing the speech signals in order to play-back the message via an amplifier 29 and the speaker 10 carried by or attached to the sound-producing unit. All the foregoing operations are under the control of a controller, generally designated 30.
  • the storage device included within circuitry 20 of memory unit 2 is a read-only memory (ROM), since the message is a fixed one for the particular article displayed.
  • the storage device within the intermediate memory 27 of the sound-­producing unit 4 is a random-access memory (RAM), since the information recorded therein changes with each new use of the sound-producing unit.
  • Controller 30 controls the sound-producing unit 4 so as to transfer the information from the ROM of circuitry 20 in the memory unit 2 at a fast rate, much faster than the normal speech rate, and controls the intermediate memory circuitry 27 of the sound-producing unit 4 to play-back this information at the normal speech rate.
  • this unit preferably would also include an anti-­ theft device, generally designated 32, such as a resonant body, which would actuate a signal or alarm if carried through a detector to prevent the theft of such units.
  • Unit 4 may also include a display 34 for displaying certain information as described below particularly with reference to Fig. 7.
  • Fig. 3 illlustrates one example of a portable sound-producing unit 4 which may be used in the system of Figs. 1 and 2.
  • unit 4 includes a housing 40 containing a speaker 42 to be applied over the user's ear for hearing the played-back messages.
  • Unit 4 further includes a plug 43 corresponding to input device 8 in Fig. 1, for plugging into any one of a plurality of output sockets 44a--44h of the memory unit, corresponding to output device 6 in the static memory unit 2 of Fig. 1.
  • memory unit 2 includes a plurality of ROM's, each containing a different stored message, and each provided with a separate output socket 44a--44h.
  • the ROM's for these output devices may store the same message but in different languages, each language identified by a legend over the respective plug 44a--44h and selected by the user by inserting plug 43 of the portable unit 4 into the respective plug 44a--44h.
  • Each of the sockets 44a--44h includes a pin 45 engageable with a reset switch 46 carried by plug 43 of the portable unit 4 to automatically initialize the energy and data transfer process of the portable unit 4.
  • a reset switch 46 carried by plug 43 of the portable unit 4 to automatically initialize the energy and data transfer process of the portable unit 4.
  • each ROM, for each plug 44a--44h contains a plurality of messages for a plurality of displayed articles, e.g., a plurality of artworks occupying a common room or a common hall and each identified by a different number.
  • the messages for all the displayed articles would be simultaneously loaded into the portable unit 4, in the language selected by the user by plugging into the respective plug 44a--44h; and then the user, at his convenience, subsequently selects each message to be played back by depressing the appropriate message-selector key or keys 47 provided in the portable unit 4.
  • Portable unit 4 illustrated in Fig. 3 further includes an On-switch 48a, an Off-switch 48b, and an indicator 49 for displaying the number of the message-­selector key or keys 47 depressed.
  • Figs. 4a and 4b illustrate one circuit implementation of the apparatus of Fig. 2 including the portable sound-producing unit 4 of Fig. 3.
  • the memory unit 2 is a passive unit; also, the sockets 44a-44h outputting the information from the memory unit 2, and the plug 43 for inputting this information into the portable sound-producing unit 4, are inductively-coupled devices performing the functions of transferring energy from unit 4 to unit 2 via path 23 (Fig. 2), and also for transferring data from unit 2 to unit 4 via path 24.
  • Fig. 4a illustrates the circuit of the portable sound-producing unit 4
  • Fig. 4b illustrates the circuit of the static memory unit 2.
  • the portable sound-producing unit 4 includes two coils 50, 51, both incorporated in its plug 43; and the memory unit 2 also includes two coils 52, 53, both incorporated in each of its sockets 44a-44h.
  • the portable sound-producing unit 4 includes two coils 50, 51, both incorporated in its plug 43; and the memory unit 2 also includes two coils 52, 53, both incorporated in each of its sockets 44a-44h.
  • plug 43 is inserted into one of the sockets 44a-44h
  • high-frequency energy from the power supply 54 of the portable unit 4 is transferred via coils 50 and 52, constituting energy-transfer path 23 in Fig. 2, to the memory unit 2; and the data from the memory unit is transferred via coils 53 and 51, constituting the data-transfer path 24 in Fig. 2, to the portable sound-producing unit 4.
  • This inductively-coupled arrangement obviates the need for direct mechanical contact between plug 43 and the sockets 44a-44h, and thereby reduces the possibility of malfunction because of defective contact, as well as reduces the need for maintaining good electrical contact between the plug and socket. It will be appreciated that a single coil on each unit may be used for effecting both energy and data transfer.
  • the power supply, battery 54, in the portable sound-producing unit 4 supplies power to that unit and also to the passive memory unit 2 under the control of the On-Off keys 48a, 48b, schematically indicated together at 48 in Fig. 4, and the Reset switch 46.
  • An RF oscillator 55 supplies the power via an amplifier 56 to coil 50 of the portable unit 4 in the energy transfer path 23 to the static memory unit 2.
  • the data transfer path 24 transfers the data stored in ROM 57 of the static memory unit 2 to the RAM 58 of the portable unit 4. Both memories 57 and 58 are organized according to bytes, each including eight bits.
  • Memory unit 2 further includes a shift register 59 which receives the data from ROM 57 in a parallel manner, and shifts it out serially via a pulse width modulator 60 and coils 53, 51, to the RAM 58 in the portable unit 4. This is done by providing each frame with nine time slots: eight are for data bits, and one is for sync. During each of the first eight time slots, one bit is sent out from the static unit 2 to the portable unit 4.
  • a counter 61 in the memory unit 2 connected to the address bus of the ROM 57, is incremented, and the contents of ROM 57 are read out to the shift register 59.
  • reset switch 46 in the plug is actuated by pin 45 in the respective socket. This produces the reset signal a (Fig. 5) which starts the down-loading process for loading RAM 58 in the portable unit 4 with the contents of the ROM 57 in the static unit 2.
  • the 27 MHz output of oscillator 55 is divided by 16 in circuit 62 and then by 9 in circuit 63.
  • the output of these two divider circuits is applied to gate 64, enabled by the reset signal a to produced signal b (Fig. 5).
  • the first eight time slots in signal b are "high” to transfer eight bits from ROM 57 of the static unit 2 to RAM 58 of the portable unit 4; the ninth time slot is "low” for synchronization.
  • Signal b added to the RF carrier signal from oscillator 55, is applied to amplifier 56 which produces the output signal c (Fig. 5). Signal c is transferred to coil 50 of the portable unit 4.
  • signal c is transferred to coil 52 of the static unit 2.
  • This signal after rectification by full-wave rectifier 65 and regulation by regulator 66, is used to power the circuit in the static unit 2.
  • Signal c from coil 52 is also used for transferring the data from ROM 57 of the static unit 2 to RAM 58 of the portable unit 4 via data transfer path 24 in the following manner.
  • Signal d from envelope detector 67 is also applied to timing circuit 70, which produces the appropriate pulses for controlling the timing of counter 61, ROM 57 and shift register 59.
  • counter 61 is connected to the address bus of ROM 57.
  • Counter 61 is loaded with O's when receiving the Reset Pulse, and is incremented by "1" whenever a sync time slot (the ninth time slot) of the frame is detected.
  • ROM 57 is organized in bytes of eight bits, and is activated during the sync (ninth) time slot.
  • shift register 59 has parallel inputs (therefore eight input lines) and a serial output (one output line).
  • each address in the ROM 57 is transferred into the shift register 59 during the ninth time slot of the respective frame, and is read out of the shift register during the eight first time slots of the next frame as controlled by timing circuit 72, which produces a clock pulse to the shift register.
  • the contents of the shift register are thus outputted serially to the pulse width modular 60, also controlled by timing circuit 72, to produced signal e .
  • Fig. 5 illustrates signals e , f , g and h as appearing in three of the time slots, each composed of four phases.
  • the first phase is always “1"; the last phase is always “0”; and the levels of the second and third phases depend on the data value.
  • both of the second and third phases are "0" to represent “0”, and both are "1" to represent "1".
  • signal e illustrated in Fig. 5 shows three time slots representing the values "0, 1, 0".
  • Signal e is modulated by the high frequency from coil 52 to produce signal f (Fig. 5), which latter signal is transmitted via coil 53 of the static unit 2 to coil 51 of the portable unit 4 in data transfer path 24.
  • envelope detector 75 removes the high-frequency carrier from the data signal, leaving only the data signal as shown by signal g ; the latter signal is the same as the previously-­mentioned signal e , plus the small propagation delay time ( ⁇ t).
  • the latter signal is applied to data clock timer 76 which produces signal h .
  • signal h is a square way of four phases: phases PH-1 and PH-2 are always “0", and phases PH-3 and PH-4 are always “1".
  • Shift register 77 samples the value of signal g at its middle point, i.e., when signal h goes from "0" to "1". If signal g is "0" at this point, the data represented is “0"; and if it is "1” at this point, the data represented is "1".
  • Shift register 77 has a serial input and parallel outputs. Signal g is always connected to the serial input, and the input is latched only at the mid-­pointof signal g , i.e., when signal h goes from "0" to "1".
  • Signal h is divided by "8" to produce a WRITE pulse to RAM 58 when a new byte is ready for "writing" into the RAM.
  • the RAM 58 of the portable unit 4 is loaded with the contents of the ROM 57 of the static unit 2 during the ninth time slot of each frame, when the sync pulse is produced.
  • the play-back of the information down-loaded into RAM 58 is controlled by the keyboard 47 via CPU 30.
  • This information is fed to the speech synthesizer 80 in the portable unit 4 under the control of CPU 30 and is amplified by amplifier 81 before being converted to sound in the speaker 10.
  • the data is transferred from ROM 57 of the memory unit 2 to RAM 58 of the portable unit 4 at a high rate, much higher than the normal speech rate, and is reproduced in the portable unit 4 at the normal speech rate.
  • This is controlled by CPU 30.
  • 1.5 minutes of speech may be compressed into one megabit of memory within ROM 57 of the memory unit 2, and maybe transferred to RAM 58 of the portable unit 4 in about 1.0 seconds; such data may then, or at any subsequent time, be reproduced by unit 4 at the normal speech rate of 1.5 minutes.
  • Fig. 6 is a pictorial illustration of one form of portable sound-producing unit 4 which may be used in the above-described system. Its various elements are identified by the same reference numerals as illustrated in Fig. 3. To facilitate portability, its housing 40 is provided with a clip 40a which may be clipped to a pocket or belt of the user.
  • Fig. 7 pictorially illustrates another form of portable sound-producing unit which may be used, particularly in applications for demonstrating a product, or the manner of manufacturing, operating or maintaining the product.
  • the memory unit corresponding to unit 2 above
  • video signals illustrating the respective article or some aspect involved in its manufacture, operation or maintenance.
  • the circuit 20 in Fig. 2 would also include digitized video information in compressed form, which video information would be transferred via the data transfer path 24 to the intermediate memory 27 of the portable unit 4 and synthesized in circuit 28 in the form of pictures to be displayed in a display.
  • the portable unit 80 includes a screen 81, e.g., an LCD (liquid crystal display) for displaying the synthesized video information, as well as a speaker 82 for reproducing the synthesized audio information.
  • the portable unit illustrated in Fig. 7 further includes a plug 83, corresponding to plug 43 in Fig. 6, for plugging into a socket of the memory unit, but does not include the keys 47 to enable selection of any one of a plurality of messages that may be transmitted by the memory unit to the portable unit.
  • Fig. 8 illustrates another implementation, also contactless as in Figs. 4 and 5, for transmitting both the energy from the portable sound-producing unit 94 to the memory unit 92 via the energy transfer path (23, Flg. 2), and also for transmitting data from the memory unit 92 to the sound-producing unit 94 via the data transfer path (24, Fig. 2).
  • the energy transfer path includes inductively-coupled coils 95 and 96 in the two units 94 and 92, respectively, but the data transfer path includes optically-coupled devices.
  • the sockets (e.g., 44a--44h, Fig. 3) of the memory unit may include infrared light devices 97
  • the plug e.g., 43 in the portable unit 4) may include photodiodes 98 for receiving the data transferred thereto by the light devices 97.
  • FIG. 8 The apparatus schematically illustrated in Fig. 8 is otherwise substantially the same as described above with respect to Figs. 4 and 5.
  • its static memory unit 92 includes a ROM 99 for storing the audio (and video) information in compressed digitized form, and a transmitter circuit 100 for reading-out this information in digitized form to the optical devices 97;
  • the portable sound-producing unit 94 includes the power supply 101 for powering that unit as well as the memory unit 92 via the inductively-coupled coils 96.
  • Unit 94 further includes a receiver 102 for receiving and storing the data transferred via optical devices 97 and 98 in a RAM 103 at a high rate, and a synthesizer 104 for synthesizing the audio signals into speech at the normal speech rate for play-back via speaker 105, and for synthesizing the video signals for display in the LCD 106, all under the control of a controller 107.
  • Fig. 9 illustrates another implementation of the invention by the use of a conventional mechanical connector for coupling the memory unit 112 to the portable sound-producing unit 114.
  • the memory unit 112 includes a multiple-contact socket 116
  • the portable sound-producing unit 114 includes a multiple-contact plug 118 engageable with the contacts of socket 116 for transferring both energy from the power supply 120 to the memory unit 112, and also for transferring the audio and video information stored in its ROM 122 in compressed digitized form to the portable unit 114 via a transfer circuit 124.
  • the digitized data is received in a receiver circuit 126 in the portable unit 114, stored at a fast rate in its RAM 128, and reproduced at the normal speech rate via synthesizer 130 in speaker 134 and display 136, under the control of processor 138.
  • the memory unit was a passive unit; that is, it does not include a power supply, but rather receives its power from the portable unit via the energy transfer path (23, Fig. 2).
  • Figs. 10 and 11 illustrate two further embodiments wherein the memory unit is an active unit, including its own power supply, but also including a data transfer path (corresponding to path 24, Fig. 2) for transferring its stored data to the portable unit.
  • Fig. 10 is similar to the arrangement illustrated in Fig. 8, except that it includes its own power supply 125, and therefore there is no need for coils 95 and 96 for transferring energy from the portable unit 124 to the memory unit 122.
  • the arrangement illustrated in Fig. 10 is similar to that of Fig. 8: it includes a ROM 126 for storing the digitized speech and video signals, and a transmitter circuit 127 for transmitting the information via light sources 128 to the photodetectors 129 of the portable unit 124.
  • the arrangement illustrated in Fig. 11 also includes an active memory unit, therein designated 132, including its own power supply 135.
  • the data transfer path (corresponding to path 24 in Fig. 1) includes a transmitting antenna 138 on the memory unit 132, and a receiving antenna 139 on the portable unit 134. This arrangement thus obviates the need for providing a plug in the portable unit and a socket in the memory unit for transmitting the data from the memory unit to the portable unit.
  • Fig. 12 illustrates the invention embodied in a graphical directory, in which the static memory unit, generally designed 142, includes a map having markings thereon indicating a reference location 142a, namely the location of the map and thereby of the person seeking information from it.
  • the map markings also include a number of other locations 142b--142n, namely the ultimate destinations of persons consulting the map.
  • Each of these destinations 142b-142n is provided with a socket connected to a ROM having digitally recorded therein a message providing directions for travelling from the reference location (that of the map) to the respective destination.
  • a person equipped with a portable sound-reproducing unit 144 may plug it into the appropriate socket 142b--142n according to the desired destination of the user, and would thereby receive a message providing directions for travelling from the location of the map to the desired destination.
  • the selector means for selecting the recorded message for a particular destination is effected by providing a plurality of sockets on the map each located at one of the destinations and each effective to select the recorded message for the respective destination.
  • Figs. 13 and 14 illustrate other variations that may be used.
  • the selector means comprises a plurality of manually-operated switches, in the form of depressable keys 242b-242n, each located at one of the destinations of the map 242, and each effective to select the recorded message for the respective destination from the reference location 242a, which is provided with a socket, as in Fig. 12, for receiving the plug end of the portable unit 244.
  • Fig. 14 illustrates a still further variation wherein the socket, therein designated 342a, for receiving the plug of the portable unit 344 is not necessarily at the reference location, but rather is in the side of the map unit 342, which map unit is merely provided with conventional markings 342b-342n illustrating various destinations from the reference location 342a. Selection of the recorded messsage for a selected destination is effected by the manually-­operated switches (e.g., 47, Fig. 6) of the portable unit itself, which specify the stored message, corresponding to the selected destination, to be read-out to the portable unit.
  • the manually-­operated switches e.g. 47, Fig. 6
  • the memory unit is described as including one or more read-only memories (ROM); it will be understood that this includes the variations of such memories, namely PROM's, EPROM's, EEPROM's, etc.
  • ROM read-only memories
EP89101687A 1989-02-01 1989-02-01 Appareil de distraction ou d'éducation produisant des sons Withdrawn EP0380727A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89101687A EP0380727A1 (fr) 1989-02-01 1989-02-01 Appareil de distraction ou d'éducation produisant des sons

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Application Number Priority Date Filing Date Title
EP89101687A EP0380727A1 (fr) 1989-02-01 1989-02-01 Appareil de distraction ou d'éducation produisant des sons

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EP0380727A1 true EP0380727A1 (fr) 1990-08-08

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EP89101687A Withdrawn EP0380727A1 (fr) 1989-02-01 1989-02-01 Appareil de distraction ou d'éducation produisant des sons

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2083896A2 (es) * 1992-12-24 1996-04-16 Guixot Juan Manuel Alfaro Sistema para la difusion de mensajes sonoros.
WO2002045050A1 (fr) * 2000-11-30 2002-06-06 Flashback Frames Pty Ltd Dispositif d'affichage
EP1247233A1 (fr) * 2000-01-12 2002-10-09 Greene Ventures, INC. Systeme et procede de communication d'informations a des sites a distance
US7254666B2 (en) 2000-01-12 2007-08-07 Memory Medallion, Inc. System and method for delivering information at inaccessible locations
US7330553B2 (en) 1989-10-25 2008-02-12 Sony Corporation Audio signal reproducing apparatus
US7337027B2 (en) 1989-10-25 2008-02-26 Sony Corporation Audio signal reproducing apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213119A (en) * 1976-04-29 1980-07-15 Energy Optics, Inc. Remote meter reading system providing demand readings and load control from conventional KWH meters
EP0231142A2 (fr) * 1986-01-26 1987-08-05 Avish Jacob Weiner Livres parlants
EP0252184A1 (fr) * 1986-06-05 1988-01-13 M & FC HOLDING COMPANY, INC. Lecture d'un compteur à travers le couvercle d'une fosse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213119A (en) * 1976-04-29 1980-07-15 Energy Optics, Inc. Remote meter reading system providing demand readings and load control from conventional KWH meters
EP0231142A2 (fr) * 1986-01-26 1987-08-05 Avish Jacob Weiner Livres parlants
EP0252184A1 (fr) * 1986-06-05 1988-01-13 M & FC HOLDING COMPANY, INC. Lecture d'un compteur à travers le couvercle d'une fosse

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7330553B2 (en) 1989-10-25 2008-02-12 Sony Corporation Audio signal reproducing apparatus
US7337027B2 (en) 1989-10-25 2008-02-26 Sony Corporation Audio signal reproducing apparatus
ES2083896A2 (es) * 1992-12-24 1996-04-16 Guixot Juan Manuel Alfaro Sistema para la difusion de mensajes sonoros.
EP1247233A1 (fr) * 2000-01-12 2002-10-09 Greene Ventures, INC. Systeme et procede de communication d'informations a des sites a distance
EP1247233A4 (fr) * 2000-01-12 2006-04-12 Greene Ventures Inc Systeme et procede de communication d'informations a des sites a distance
US7254666B2 (en) 2000-01-12 2007-08-07 Memory Medallion, Inc. System and method for delivering information at inaccessible locations
US7395960B1 (en) * 2000-01-12 2008-07-08 Memory Medallion, Inc. System and method for delivering information at remote locations
WO2002045050A1 (fr) * 2000-11-30 2002-06-06 Flashback Frames Pty Ltd Dispositif d'affichage

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