CA2105543A1 - Programmable, caller identification telephone alerting device - Google Patents
Programmable, caller identification telephone alerting deviceInfo
- Publication number
- CA2105543A1 CA2105543A1 CA 2105543 CA2105543A CA2105543A1 CA 2105543 A1 CA2105543 A1 CA 2105543A1 CA 2105543 CA2105543 CA 2105543 CA 2105543 A CA2105543 A CA 2105543A CA 2105543 A1 CA2105543 A1 CA 2105543A1
- Authority
- CA
- Canada
- Prior art keywords
- incoming
- source
- telephone
- signal
- telephone receiver
- 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.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
Abstract
ABSTRACT
A telephone answering device provides an audible signal that corresponds to the category of incoming calls, in accordance with a programmed allocation of caller identification numbers effected by the person acting as a recipient of calls.
A telephone answering device provides an audible signal that corresponds to the category of incoming calls, in accordance with a programmed allocation of caller identification numbers effected by the person acting as a recipient of calls.
Description
2~ L~3 Title: PROGR~laBLE C;~LLER IDE~ FICATIO~
TELEPHONE ALERTI~G D~VICB
Field of the Invention The present invention is directed to subscriber 05 telephone apparatus in general, and in particular to :
apparatus for selectively alerting the subscriber to incoming calls. More particularly, it is directed to a method and apparatus for enabling a subscriber to program the apparatus and classify incoming calls into :
classes and generate different alerting signals depending on, and indicative of, the class to which an incoming call has been assigned. In the preferred ~:
embodiment, the typical telephone system calling number identi~ication signal is used for this purpose.
Prior Art of the Invention The closest prior art to the invention that is known is United States Patent Number 4,791,664 granted December 13, 1988 to Lutz et al. This reference discloses a system for selectively receiving incoming telephone calls at a phoneset and includes an automatic answering device which answer~ all incoming calls by 2 1 ~
~ , .
placing a simulated phone load across the phone lines.
The answering device also enables a dual tone multifrequency (DTMF) recei~er to receive tone fre~uencies input by a caller. The DTMF receiver 05 decodes the tone pulses provided by the caller into binary coded decimal values which are stored in successive storage registers. A comparator compares the values stored in the registers with a respective code for "authorized" calls input by the subscriber and outputs a signal when the code dialed in by the caller matches the code previously input by the subscriber.
The signal acti~ates an electronic ringer circuit which serYes to alert the subscriber in the normal manner to the presence of an authorized call. An off-hook detector detects the pick-up o~ a phoneset by the subscriber and acts to disable the electronic ringer circuit. Upon the placing of the phoneset back into its cradle, the off-hook detector activates an automatic reset circuit which resets the automatic answering device as well as the code storage registers.
Thus, in the Lutz et al patent, a caller must enter a code prearranged with the recipient of the call in order for his call to penetrate this call-filtering system. There is no provision for a subscriber to preprogram his/her station apparatus to operate without ;~
2~ 3
TELEPHONE ALERTI~G D~VICB
Field of the Invention The present invention is directed to subscriber 05 telephone apparatus in general, and in particular to :
apparatus for selectively alerting the subscriber to incoming calls. More particularly, it is directed to a method and apparatus for enabling a subscriber to program the apparatus and classify incoming calls into :
classes and generate different alerting signals depending on, and indicative of, the class to which an incoming call has been assigned. In the preferred ~:
embodiment, the typical telephone system calling number identi~ication signal is used for this purpose.
Prior Art of the Invention The closest prior art to the invention that is known is United States Patent Number 4,791,664 granted December 13, 1988 to Lutz et al. This reference discloses a system for selectively receiving incoming telephone calls at a phoneset and includes an automatic answering device which answer~ all incoming calls by 2 1 ~
~ , .
placing a simulated phone load across the phone lines.
The answering device also enables a dual tone multifrequency (DTMF) recei~er to receive tone fre~uencies input by a caller. The DTMF receiver 05 decodes the tone pulses provided by the caller into binary coded decimal values which are stored in successive storage registers. A comparator compares the values stored in the registers with a respective code for "authorized" calls input by the subscriber and outputs a signal when the code dialed in by the caller matches the code previously input by the subscriber.
The signal acti~ates an electronic ringer circuit which serYes to alert the subscriber in the normal manner to the presence of an authorized call. An off-hook detector detects the pick-up o~ a phoneset by the subscriber and acts to disable the electronic ringer circuit. Upon the placing of the phoneset back into its cradle, the off-hook detector activates an automatic reset circuit which resets the automatic answering device as well as the code storage registers.
Thus, in the Lutz et al patent, a caller must enter a code prearranged with the recipient of the call in order for his call to penetrate this call-filtering system. There is no provision for a subscriber to preprogram his/her station apparatus to operate without ;~
2~ 3
- 3 -the cooperation of the calling party. Moreover, in Lutz et al, a calling party is either "authorized", when the subscriber is alerted, or the caller i6 "unauthorized";
in which latter case the subscriber is not even aware of 05 the occurrence of a call.
The present invention has as its object the processiny of incoming calls to provide alert signals, or rings, which are characteristic of the source of the ~-call. Thus, calls are not filtered by the present invention, but processed to provide a characterizing audible signal cross-referenced to a call's source, even before the phone is answered.
The invention in its general form will first be described, and then its implementation in terms of specific embodiments will be detailed with reference to the drawings following hereafter. These e~bodiments are intended to demonstrate the principle of the invention, and the manner of its implementation. The invention in its broadest and more specific forms will then be further ~ ;
described, and defined, in each of the individual claims which conclude this Specification.
SummarY of the Invention According to one of its brcadest aspects, the invention comprises a telecommunications device that produces an audible indication of the identity, or category, of the source of an incoming phone call. By appropriate programming the device can be used to identify the intended recipient of a call by producing a 05 different, personalized ring for each of a number of call sources that have been identified as being likely to be calls directPd to such intended recipient. It can also produce a ring identifying the category of the incoming call (business, family, etc.).
The invention is intended as an affordable device that can be connected between the wall jack and a phone unit. The user must be subscribed to the Caller Identification service of~ered by the local telephone company which provides a signal corresponding to the caller's source phone number; or have the cooperation of the Caller in providing a special source identifier signal, in order for the invention to operate.
The invention is a user-programmable device. It can be programmed using the touch-tone buttons of the phone unit or using a dedicated input system ~uch as a keypad. Optio~ally the programming can be done while the phone is ringing (on-hook), while the conversation is taking place (off-hook), or in between calls.
When an incoming phone call is detected, the unit may display the Caller ID of the caller on a standard liquid crystal display unit. To program the device to produce an identifying sound corresponding to : '~
2 ~ Q ~ ~ ~ 3 -- _ 5 -this number, the call recipient can use the phone unit's touch tone buttons to tag and store the calling source's originating telephone number as an identifier and provide a co-related distinct audible signal that is 05 assigned to such source identifier. ~he co-related audible signal may be drawn from a class of pre-recorded audible signal patterns available ~rom within the device, or may be user generated.
As examples of the type of audible signals to be emitted a specific sound may be reserved for a specific calling source, or such signals may designate the likely intended recipient o~ an incoming call. Further, multiple ~ignals may be provided. -Thu~, for example, on receiving an incoming call two buttons may be pressed in succession, the ~irst indicating that the source of the call is of a category assigned to a specific intended call recipient (such as child or adult in a household); the second further distinguishing the category of the call within a subclass (such as busines6 or personal). The next time an incoming call from this number will be detected, the ::
device of the invention may produce an audible sound or ring consisting of two parts, one identifying the assigned intended recipient and the other identifying the category of the call~ The deviae is thus easily and incrementally programmed by the u~er.
2 ~
Accordingly, the present invention provides an apparatus for distinguishing between at least two pluralities of 20 incoming telephone (or the like) calls, comprising:
05 (a) means for storing a first plurality o~ incoming caller identification data;
(b) means for identifying a second plurality o~
incoming caller identification data;
(c) alerting means responæive in a first mode of alerting to an incoming caIl belonging to the ~irst pluralityl and responsive in a second mode to an incoming call belonging to the second plurality. ~
The invention is based upon a telephone call ~ -answering device comprising~
(1) means to intercept an incoming telephone signal :~
from a source that provide6 in such signal a .. .
source identifier associated with the identity :~
of the calling source; :~
(2) &torage ~eans for presexving a record o~ a plurality of stored calling source identi~iers; : ;
(3) comparator means for comparing the inaoming -:
source identity indication with the stored calling source identity indications to determine it a match exists; ~;
in which latter case the subscriber is not even aware of 05 the occurrence of a call.
The present invention has as its object the processiny of incoming calls to provide alert signals, or rings, which are characteristic of the source of the ~-call. Thus, calls are not filtered by the present invention, but processed to provide a characterizing audible signal cross-referenced to a call's source, even before the phone is answered.
The invention in its general form will first be described, and then its implementation in terms of specific embodiments will be detailed with reference to the drawings following hereafter. These e~bodiments are intended to demonstrate the principle of the invention, and the manner of its implementation. The invention in its broadest and more specific forms will then be further ~ ;
described, and defined, in each of the individual claims which conclude this Specification.
SummarY of the Invention According to one of its brcadest aspects, the invention comprises a telecommunications device that produces an audible indication of the identity, or category, of the source of an incoming phone call. By appropriate programming the device can be used to identify the intended recipient of a call by producing a 05 different, personalized ring for each of a number of call sources that have been identified as being likely to be calls directPd to such intended recipient. It can also produce a ring identifying the category of the incoming call (business, family, etc.).
The invention is intended as an affordable device that can be connected between the wall jack and a phone unit. The user must be subscribed to the Caller Identification service of~ered by the local telephone company which provides a signal corresponding to the caller's source phone number; or have the cooperation of the Caller in providing a special source identifier signal, in order for the invention to operate.
The invention is a user-programmable device. It can be programmed using the touch-tone buttons of the phone unit or using a dedicated input system ~uch as a keypad. Optio~ally the programming can be done while the phone is ringing (on-hook), while the conversation is taking place (off-hook), or in between calls.
When an incoming phone call is detected, the unit may display the Caller ID of the caller on a standard liquid crystal display unit. To program the device to produce an identifying sound corresponding to : '~
2 ~ Q ~ ~ ~ 3 -- _ 5 -this number, the call recipient can use the phone unit's touch tone buttons to tag and store the calling source's originating telephone number as an identifier and provide a co-related distinct audible signal that is 05 assigned to such source identifier. ~he co-related audible signal may be drawn from a class of pre-recorded audible signal patterns available ~rom within the device, or may be user generated.
As examples of the type of audible signals to be emitted a specific sound may be reserved for a specific calling source, or such signals may designate the likely intended recipient o~ an incoming call. Further, multiple ~ignals may be provided. -Thu~, for example, on receiving an incoming call two buttons may be pressed in succession, the ~irst indicating that the source of the call is of a category assigned to a specific intended call recipient (such as child or adult in a household); the second further distinguishing the category of the call within a subclass (such as busines6 or personal). The next time an incoming call from this number will be detected, the ::
device of the invention may produce an audible sound or ring consisting of two parts, one identifying the assigned intended recipient and the other identifying the category of the call~ The deviae is thus easily and incrementally programmed by the u~er.
2 ~
Accordingly, the present invention provides an apparatus for distinguishing between at least two pluralities of 20 incoming telephone (or the like) calls, comprising:
05 (a) means for storing a first plurality o~ incoming caller identification data;
(b) means for identifying a second plurality o~
incoming caller identification data;
(c) alerting means responæive in a first mode of alerting to an incoming caIl belonging to the ~irst pluralityl and responsive in a second mode to an incoming call belonging to the second plurality. ~
The invention is based upon a telephone call ~ -answering device comprising~
(1) means to intercept an incoming telephone signal :~
from a source that provide6 in such signal a .. .
source identifier associated with the identity :~
of the calling source; :~
(2) &torage ~eans for presexving a record o~ a plurality of stored calling source identi~iers; : ;
(3) comparator means for comparing the inaoming -:
source identity indication with the stored calling source identity indications to determine it a match exists; ~;
(4) audible alerting ~eans for generating a distinct audible signal corresponding to said i~coming r~
~:, '`~, ~; - 7 -source id~ntifier when said comparator means determines that a match exists between the incoming source identifier and one of said stored calling source identity indications.
05 The invention may further comprise user-activated input means to:
(a) store a specific incoming source identifier as a stored calling source identity indication in said storage mean~; and (b) establish the distinct audible signal that corresponds to such specific incoming source identifier.
Additionally, the apparatus of the invention may operate in combination with a telephone receiver having a tone generating keypad wherein the user activated input means comprises such keypad.
The devic~ of the invention may be used in combination with a telephone receiver having a tone generating keypad wherein~
(a) said audible alerting m~ans contains a ring storage register for storing ring codes for generating each respective distinct audible signal; and (b) said keypad is coupled to said audible alerting means for providing such storage register with stored ring codes.
2 1 ~
Further, such device, in co~bination with a telephone receiver, may be provided with means to suppress the normal ring signal of such telephone receiver when a match i5 established by a comparator, or 05 to permit said telephone receiver to emit its normal ring signal when a match is not established by the comparator.
The foregoing summarizes the principal features of the invention and some o~ its optional aspects. The invention may be further understood by the description o~ the preferred embodiments in conjunction with the : :
general knowledge of those skilled in this field~ and the drawings, which now follow. :~
Brief Description of the Drawi~qs ;~
Figure 1 is an overall block schematic of the apparatu~ according to the present invention; ~;
Figure 2 is an Algorithmic State Machine diagram o~ the operation of the apparatus, according to the present invention; . ~:~
Figure 3 is a functional tree diagram shoving the functions of the apparatus of Figure 1.
Figure 4 is a data flow diagram in the apparatus : :
of Figure l; and Flgure 5 is a flow chart ~or the program identifying the state machine of Figure 2.
~ ~ 8~
~ 9 petailed Description of the Preferred Embodiment Referring to the drawings, Figure 1 shows the block diagram of the device, indicating the various functional units o~ the device. As can be seen, a phone 05 unit 10 is separate, but may be made an integral part of the apparatus. A demodulator block 11 is used to extract the digital information containing the Caller ID
that is transmitted between the first and second rings of an incoming call. A tone decoder 12 is needed to recognize the touch tone button inputs of the user received from the phone unit. Non-volatile memory 13 is used to ~tore the device software and the user programmed numbers. The memory 13 may be a non-volatile RAM or other equivalent system.
Figure ~ shows an Algorithmic State Machine (ASM) diagram of the unit. It show~ the flow of control for the design. Each possible state is represented by a circle, with its title next to it in the oval-6haped bubble. Inside the circles are the outputs for that state. Arrows represent conditions that cause a state transition. The condition is written next to the arrow.
Figure 3 is a functional breakdown of the design in tree form, showing all the functions and their relations, or groupings. There are four main categories of functions for the de~ign, which are then subdivided into smaller, more specific functionsO
2 ~ 3i~
Figure 4 illustrates the flow of data in the design. There are two inputs: tones ~rom the phone unit, and modulated digital data from the telephone source. The diagram shows how this information is 05 captured by the unit and transformed into useful signals corresponding to the source of the input, and its destination within the system. ~ -Figure 5 shows a software structured flow chart, identifying the various decisions and general functions the software must make. The design has two branches, which will work in parallel: the call capture, process ~`
and ring output module. The programming section, which can be activated at several stages during the execution of the normally running the other software ~odules.
Conclusion The foregoing has constituted a description of pecific embodiments showing how the invention may be applied and put into use. These embodiments are only exemplary. The invention in its broadest, and more ~pecific aspects, is further described and defined in the claims which now follow.
2~ 3 These claims, and the language used therein, are to be understood in terms of tha variants of the invention which have been described. They are not to be restricted to such variants, but are to be read as ~.
05 covering the full scope of the invention as is implicit within the invention and the disclosure that has been provided herein.
. . ~.
~:, '`~, ~; - 7 -source id~ntifier when said comparator means determines that a match exists between the incoming source identifier and one of said stored calling source identity indications.
05 The invention may further comprise user-activated input means to:
(a) store a specific incoming source identifier as a stored calling source identity indication in said storage mean~; and (b) establish the distinct audible signal that corresponds to such specific incoming source identifier.
Additionally, the apparatus of the invention may operate in combination with a telephone receiver having a tone generating keypad wherein the user activated input means comprises such keypad.
The devic~ of the invention may be used in combination with a telephone receiver having a tone generating keypad wherein~
(a) said audible alerting m~ans contains a ring storage register for storing ring codes for generating each respective distinct audible signal; and (b) said keypad is coupled to said audible alerting means for providing such storage register with stored ring codes.
2 1 ~
Further, such device, in co~bination with a telephone receiver, may be provided with means to suppress the normal ring signal of such telephone receiver when a match i5 established by a comparator, or 05 to permit said telephone receiver to emit its normal ring signal when a match is not established by the comparator.
The foregoing summarizes the principal features of the invention and some o~ its optional aspects. The invention may be further understood by the description o~ the preferred embodiments in conjunction with the : :
general knowledge of those skilled in this field~ and the drawings, which now follow. :~
Brief Description of the Drawi~qs ;~
Figure 1 is an overall block schematic of the apparatu~ according to the present invention; ~;
Figure 2 is an Algorithmic State Machine diagram o~ the operation of the apparatus, according to the present invention; . ~:~
Figure 3 is a functional tree diagram shoving the functions of the apparatus of Figure 1.
Figure 4 is a data flow diagram in the apparatus : :
of Figure l; and Flgure 5 is a flow chart ~or the program identifying the state machine of Figure 2.
~ ~ 8~
~ 9 petailed Description of the Preferred Embodiment Referring to the drawings, Figure 1 shows the block diagram of the device, indicating the various functional units o~ the device. As can be seen, a phone 05 unit 10 is separate, but may be made an integral part of the apparatus. A demodulator block 11 is used to extract the digital information containing the Caller ID
that is transmitted between the first and second rings of an incoming call. A tone decoder 12 is needed to recognize the touch tone button inputs of the user received from the phone unit. Non-volatile memory 13 is used to ~tore the device software and the user programmed numbers. The memory 13 may be a non-volatile RAM or other equivalent system.
Figure ~ shows an Algorithmic State Machine (ASM) diagram of the unit. It show~ the flow of control for the design. Each possible state is represented by a circle, with its title next to it in the oval-6haped bubble. Inside the circles are the outputs for that state. Arrows represent conditions that cause a state transition. The condition is written next to the arrow.
Figure 3 is a functional breakdown of the design in tree form, showing all the functions and their relations, or groupings. There are four main categories of functions for the de~ign, which are then subdivided into smaller, more specific functionsO
2 ~ 3i~
Figure 4 illustrates the flow of data in the design. There are two inputs: tones ~rom the phone unit, and modulated digital data from the telephone source. The diagram shows how this information is 05 captured by the unit and transformed into useful signals corresponding to the source of the input, and its destination within the system. ~ -Figure 5 shows a software structured flow chart, identifying the various decisions and general functions the software must make. The design has two branches, which will work in parallel: the call capture, process ~`
and ring output module. The programming section, which can be activated at several stages during the execution of the normally running the other software ~odules.
Conclusion The foregoing has constituted a description of pecific embodiments showing how the invention may be applied and put into use. These embodiments are only exemplary. The invention in its broadest, and more ~pecific aspects, is further described and defined in the claims which now follow.
2~ 3 These claims, and the language used therein, are to be understood in terms of tha variants of the invention which have been described. They are not to be restricted to such variants, but are to be read as ~.
05 covering the full scope of the invention as is implicit within the invention and the disclosure that has been provided herein.
. . ~.
Claims (6)
PROPERTY IS CLAIMED AS FOLLOWS:
1. Apparatus for distinguishing between two pluralities of incoming telephone (or the like) calls, comprising:
(a) means for storing a first plurality of incoming caller identification data;
(b) means for identifying a second plurality of incoming caller identification data;
(c) alerting means responsive in a first mode of alerting to an incoming call belonging to the first plurality, and responsive in a second mode to an incoming call belonging to the second plurality.
(a) means for storing a first plurality of incoming caller identification data;
(b) means for identifying a second plurality of incoming caller identification data;
(c) alerting means responsive in a first mode of alerting to an incoming call belonging to the first plurality, and responsive in a second mode to an incoming call belonging to the second plurality.
2. A telephone call answering device comprising:
(1) means to intercept an incoming telephone signal from a source that provides in such signal a source identifier associated with the identity of the calling source;
(2) storage means for preserving a record of a plurality of stored calling source identifiers;
(3) comparator means for comparing the incoming source identity indication with the stored calling source identity indications to determine it a match exists;
(4) audible alerting means for generating a distinct audible signal corresponding to said incoming source identifier when said comparator means determines that a match exists between the incoming source identifier and one of said stored calling source identity indications.
(1) means to intercept an incoming telephone signal from a source that provides in such signal a source identifier associated with the identity of the calling source;
(2) storage means for preserving a record of a plurality of stored calling source identifiers;
(3) comparator means for comparing the incoming source identity indication with the stored calling source identity indications to determine it a match exists;
(4) audible alerting means for generating a distinct audible signal corresponding to said incoming source identifier when said comparator means determines that a match exists between the incoming source identifier and one of said stored calling source identity indications.
3. A device as in claim 2 further comprising user-activated input means to:
(a) store a specific incoming source identifier as a stored calling source identity indication in said storage means; and (b) establish the distinct audible signal that corresponds to such specific incoming source identifier.
A device as in claim 3 in combination with a telephone receiver having a tone generating keypad wherein said user activated input means comprises said keypad.
(a) store a specific incoming source identifier as a stored calling source identity indication in said storage means; and (b) establish the distinct audible signal that corresponds to such specific incoming source identifier.
A device as in claim 3 in combination with a telephone receiver having a tone generating keypad wherein said user activated input means comprises said keypad.
4. A device as in claim 2, 3 or 4 in combination with a telephone receiver having a tone generating keypad wherein:
(a) said audible alerting means contains a ring storage register for storing ring codes for generating each respective distinct audible signal; and (b) said keypad is coupled to said audible alerting means for providing such storage register with stored ring codes.
(a) said audible alerting means contains a ring storage register for storing ring codes for generating each respective distinct audible signal; and (b) said keypad is coupled to said audible alerting means for providing such storage register with stored ring codes.
5. A device as in claim 2, 3 or 4 in combination with a telephone receiver further comprising means to suppress the normal ring signal of such telephone receiver when a match is established by a comparator.
6. A device as in claims 2 or 3 in combination with a telephone receiver further comprising means to permit said telephone receiver to emit its normal ring signal when a match is not established by the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2105543 CA2105543A1 (en) | 1993-09-03 | 1993-09-03 | Programmable, caller identification telephone alerting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2105543 CA2105543A1 (en) | 1993-09-03 | 1993-09-03 | Programmable, caller identification telephone alerting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2105543A1 true CA2105543A1 (en) | 1995-03-04 |
Family
ID=4152263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2105543 Abandoned CA2105543A1 (en) | 1993-09-03 | 1993-09-03 | Programmable, caller identification telephone alerting device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2105543A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999001973A1 (en) * | 1997-07-03 | 1999-01-14 | Maxon Systems Inc. (London) Ltd. | Telephone apparatus and user notification method |
| GB2364471A (en) * | 1999-12-13 | 2002-01-23 | Matsushita Electric Ind Co Ltd | Classifying stored telephone numbers into groups |
-
1993
- 1993-09-03 CA CA 2105543 patent/CA2105543A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999001973A1 (en) * | 1997-07-03 | 1999-01-14 | Maxon Systems Inc. (London) Ltd. | Telephone apparatus and user notification method |
| GB2364471A (en) * | 1999-12-13 | 2002-01-23 | Matsushita Electric Ind Co Ltd | Classifying stored telephone numbers into groups |
| GB2364471B (en) * | 1999-12-13 | 2003-06-18 | Matsushita Electric Ind Co Ltd | Telephone apparatus |
| US6882713B2 (en) | 1999-12-13 | 2005-04-19 | Matsushita Electric Industrial Co., Ltd. | Telephone apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |