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US1002600A
(en)
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1909-08-14 |
1911-09-05 |
Edward Robert Morris |
Means for detecting counterfeit bank-notes, bonds, coupons, and the like.
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(en)
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1946-11-09 |
1951-10-30 |
Serge A Scherbatskoy |
System of determining the listening habits of wave signal receiver users
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(en)
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1951-05-25 |
1953-03-03 |
Musicast Inc |
System for transmitting and receiving coded entertainment programs
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(en)
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1951-07-25 |
1956-10-09 |
Internat Telementer Corp |
System and apparatus for determining popularity ratings of different transmitted programs
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(en)
|
1951-08-30 |
1959-04-07 |
Zenith Radio Corp |
Subscriber television system with code reset bursts in audio channel
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(en)
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1954-04-29 |
1961-10-10 |
Muzak Corp |
Identification of sound and like signals
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(en)
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1962-02-07 |
1981-01-13 |
Magnavox Government And Industrial Electronics Co. |
Communication system
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US3406344A
(en)
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1964-07-01 |
1968-10-15 |
Bell Telephone Labor Inc |
Transmission of low frequency signals by modulation of voice carrier
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DE1260295B
(de)
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1964-12-04 |
1968-02-01 |
Agfa Gevaert Ag |
Verfahren und Vorrichtung zur Herstellung von Kopien
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US3493674A
(en)
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1965-05-28 |
1970-02-03 |
Rca Corp |
Television message system for transmitting auxiliary information during the vertical blanking interval of each television field
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US3492577A
(en)
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1966-10-07 |
1970-01-27 |
Intern Telemeter Corp |
Audience rating system
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GB1218015A
(en)
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1967-03-13 |
1971-01-06 |
Nat Res Dev |
Improvements in or relating to systems for transmitting television signals
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(en)
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1968-01-29 |
1971-06-15 |
Rca Corp |
Coding arrangements for multiplexed messages
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(en)
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1968-03-11 |
1980-10-28 |
International Business Machines Corporation |
Anti-jam communications system
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(en)
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1968-06-26 |
1972-08-15 |
Kahn Res Lab |
Single channel audio signal transmission system
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(en)
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1969-04-14 |
1971-06-08 |
Ardac Inc |
Paper document validation apparatus
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US3845391A
(en)
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1969-07-08 |
1974-10-29 |
Audicom Corp |
Communication including submerged identification signal
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(en)
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1969-10-17 |
1972-01-25 |
Westinghouse Electric Corp |
Classification method and apparatus for pattern recognition systems
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(en)
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1970-05-19 |
1971-06-22 |
Technology Uk |
Telecommunication apparatus
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(en)
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1970-07-27 |
1972-10-03 |
Kahn Res Lab |
Audio signal transmission system and method
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(en)
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1970-10-08 |
1972-04-11 |
Symons Corp |
Self-contained waler clamp assembly for concrete wall form
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JPS5619141B1
(enExample)
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1970-10-24 |
1981-05-06 |
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US3703628A
(en)
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1971-03-29 |
1972-11-21 |
Recognition Equipment Inc |
System for document coding and identification
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US3735048A
(en)
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1971-05-28 |
1973-05-22 |
Motorola Inc |
In-band data transmission system
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US3971917A
(en)
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1971-08-27 |
1976-07-27 |
Maddox James A |
Labels and label readers
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SE365325B
(enExample)
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1971-11-04 |
1974-03-18 |
Rothfjell R |
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JPS4953817A
(enExample)
|
1972-09-25 |
1974-05-25 |
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US3809806A
(en)
|
1972-10-18 |
1974-05-07 |
Columbia Broadcasting Syst Inc |
Banding correction system for film recording apparatus
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US3838444A
(en)
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1972-10-30 |
1974-09-24 |
Hazeltine Research Inc |
System for transmitting auxiliary information in low energy density portion of color tv spectrum
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(en)
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1972-12-01 |
1976-07-20 |
Grasham James A |
Color encoding-decoding method
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(en)
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1973-02-01 |
1974-04-16 |
Storage Technology Corp |
Tape velocity detector
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US3894190A
(en)
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1973-02-28 |
1975-07-08 |
Int Standard Electric Corp |
System for transferring wide-band sound signals
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US3918567A
(en)
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1973-03-28 |
1975-11-11 |
Edward D Kittredge |
Process printing
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US3885217A
(en)
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1973-07-11 |
1975-05-20 |
Computer Specifics Corp |
Data transmission system
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GB1467240A
(en)
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1973-09-04 |
1977-03-16 |
Gen Electric Co Ltd |
Television systems
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US3984684A
(en)
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1974-02-06 |
1976-10-05 |
Douglas Fredwill Winnek |
Three-dimensional radiography
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US3914877A
(en)
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1974-04-08 |
1975-10-28 |
Marion E Hines |
Image scrambling technique
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US3900890A
(en)
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1974-05-06 |
1975-08-19 |
Sperry Rand Corp |
Speed tolerant recording and recovery system
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US3937565A
(en)
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1974-06-03 |
1976-02-10 |
Alasia Alfred Victor |
Process of coding indicia and product produced thereby
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DE2454227C3
(de)
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1974-11-15 |
1979-05-03 |
Blaupunkt-Werke Gmbh, 3200 Hildesheim |
Fernsehempfänger zum Empfang u. Auswerten von zusätzlichen Informationen in einem Fernsehsignal
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US3977785A
(en)
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1975-01-06 |
1976-08-31 |
Xerox Corporation |
Method and apparatus for inhibiting the operation of a copying machine
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US4134127A
(en)
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1975-06-12 |
1979-01-09 |
Indesit Industria Elettrodomestici Italiana S.P.A. |
Color television signal including auxiliary information
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US4086634A
(en)
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1975-07-30 |
1978-04-25 |
Cook Laboratories, Inc. |
Method and apparatus for preparing recorded program material to prevent unauthorized duplication by magnetic tape recording
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(en)
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1975-11-17 |
1980-01-22 |
Lgz Landis & Gyr Zug Ag |
Documents embossed with optical markings representing genuineness information
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US4025851A
(en)
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1975-11-28 |
1977-05-24 |
A.C. Nielsen Company |
Automatic monitor for programs broadcast
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US4048619A
(en)
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1976-09-07 |
1977-09-13 |
Digital Data Inc. |
Secure two channel sca broadcasting system
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CH607170A5
(enExample)
|
1976-10-28 |
1978-11-30 |
Sodeco Compteurs De Geneve |
|
|
US4122501A
(en)
|
1976-12-13 |
1978-10-24 |
Sperry Rand Corporation |
System for recording and reading back data on a recording media
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NL7702019A
(nl)
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1977-02-25 |
1978-08-29 |
Philips Nv |
Radio-omroepsysteem met zenderkarakterisering.
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US4310180A
(en)
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1977-05-18 |
1982-01-12 |
Burroughs Corporation |
Protected document and method of making same
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US4297729A
(en)
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1977-11-24 |
1981-10-27 |
Emi Limited |
Encoding and decoding of digital recordings
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DE2757171C3
(de)
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1977-12-22 |
1980-07-10 |
Standard Elektrik Lorenz Ag, 7000 Stuttgart |
Verfahren und Anordnung zur Übertragung zweier unterschiedlicher Informationen in einem einzigen Übertragungskanal vorgegebener Bandbreite auf einer Trägerwelle
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US4225967A
(en)
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1978-01-09 |
1980-09-30 |
Fujitsu Limited |
Broadcast acknowledgement method and system
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(en)
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1978-03-27 |
1981-04-14 |
Computation Planning, Inc. |
Security system for data processing
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(en)
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1978-05-05 |
1980-08-19 |
International Business Machines Corporation |
Method for authenticating the identity of a user of an information system
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US4164745A
(en)
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1978-05-08 |
1979-08-14 |
Northern Telecom Limited |
Printing by modulation of ink viscosity
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US4268983A
(en)
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1978-12-26 |
1981-05-26 |
Minnesota Mining And Manufacturing Company |
Security label
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DE2901150C2
(de)
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1979-01-12 |
1981-02-19 |
Gao Gesellschaft Fuer Automation Und Organisation Mbh, 8000 Muenchen |
Ausweiskarte mit im Auf- und Durchlicht prüf baren Echtheitsmerkmalen und Verfahren zu ihrer Herstellung
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US4379947A
(en)
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1979-02-02 |
1983-04-12 |
Teleprompter Corporation |
System for transmitting data simultaneously with audio
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FR2448824A1
(fr)
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1979-02-06 |
1980-09-05 |
Telediffusion Fse |
Systeme de videotex muni de moyens de controle d'acces a l'information
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FR2448825A1
(fr)
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1979-02-06 |
1980-09-05 |
Telediffusion Fse |
Systeme de transmission d'information entre un centre d'emission et des postes recepteurs, ce systeme etant muni d'un moyen de controle de l'acces a l'information transmise
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US4230990C1
(en)
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1979-03-16 |
2002-04-09 |
John G Lert Jr |
Broadcast program identification method and system
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(en)
*
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1979-03-16 |
1981-03-31 |
Yum Robert S |
Differential transmission with limited torque transmitter
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US4237484A
(en)
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1979-08-08 |
1980-12-02 |
Bell Telephone Laboratories, Incorporated |
Technique for transmitting digital data together with a video signal
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GB2063018B
(en)
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1979-10-08 |
1984-03-28 |
Gen Electric Co Ltd |
Telecommunication systems
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(en)
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1979-10-11 |
1982-09-28 |
Burroughs Corporation |
Security document and method for making same using an alternating dot pattern
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DE2943436A1
(de)
*
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1979-10-26 |
1981-05-07 |
Wolfram Dr.-Ing. 5100 Aachen Szepanski |
Maschinell pruefbares schutzmuster fuer dokumente und verfahren zur erzeugung und pruefung des schutzmusters
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GB2067871A
(en)
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1980-01-19 |
1981-07-30 |
Marconi Co Ltd |
Information Encoding Systems
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US4313197A
(en)
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1980-04-09 |
1982-01-26 |
Bell Telephone Laboratories, Incorporated |
Spread spectrum arrangement for (de)multiplexing speech signals and nonspeech signals
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CA1160749A
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1980-06-23 |
1984-01-17 |
Robert N. Goldman |
Non-counterfeitable document system
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1981-06-22 |
1984-10-09 |
Light Signatures, Inc. |
Secure transaction card and verification system
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AU547877B2
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1980-09-26 |
1985-11-07 |
B. Lofberg |
Method for processing an information signal and means for carrying out the method
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(en)
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1980-09-29 |
1983-06-21 |
Harris Corporation |
Digitally-controlled analog encrypton
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1980-11-26 |
1983-11-15 |
News Log International, Inc. |
Method and apparatus for optically reading digital data inscribed in an arcuate pattern on a data carrier
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1980-11-26 |
1983-07-26 |
Lundy Rene R |
Auditory subliminal message system and method
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1980-12-08 |
1983-01-04 |
Sterling Television Presentations Inc. Video Data Systems Division |
Data encoding for television
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ATE13735T1
(de)
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1981-02-16 |
1985-06-15 |
British Telecomm |
Verfahren und geraet zur uebertragung von daten mit digital kodierter sprache.
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1981-06-03 |
1984-03-20 |
Crane And Company |
Method and apparatus for providing security features in paper
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1981-09-03 |
1984-01-10 |
Applied Spectrum Technologies, Inc. |
Data under voice communications system
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1981-11-03 |
1990-10-23 |
The Personalized Mass Media Corporation |
Signal processing apparatus and methods
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GB2114795B
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1981-12-21 |
1985-08-14 |
Omron Tateisi Electronics Co |
Verifying system
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1982-01-08 |
1984-01-10 |
Applied Spectrum Technologies, Inc. |
Simultaneous transmission of two information signals within a band-limited communications channel
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JPS58198934A
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1982-05-17 |
1983-11-19 |
Sony Corp |
秘話装置
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1982-06-24 |
1997-10-07 |
Cooper; J. Carl |
Apparatus and method for transmitting audio signals as part of a television video signal
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1982-06-24 |
1987-05-12 |
Cooper J Carl |
Apparatus and method for receiving audio signals transmitted as part of a television video signal
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JPS5911490A
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1982-07-12 |
1984-01-21 |
株式会社東芝 |
入出金装置
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1982-07-22 |
1987-02-17 |
Tvi Systems, Ltd. |
Anti-copy system
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1982-08-05 |
1985-01-22 |
At&T Bell Laboratories |
Transmitting data on the phase of speech
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1982-11-08 |
1995-05-02 |
Desper Products, Inc. |
Automatic stereophonic manipulation system and apparatus for image enhancement
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1983-01-10 |
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Fpdc, Inc. |
System for reproducing information in material objects at a point of sale location
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JPS59137942A
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1983-01-28 |
1984-08-08 |
Hitachi Ltd |
画像位置合わせ方式
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1983-03-21 |
1989-02-14 |
Greenberg Burton L |
Television program transmission verification method and apparatus
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1983-03-21 |
1987-01-27 |
Greenberg Burton L |
Method and apparatus for the automatic identification and verification of television broadcast programs
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1983-03-21 |
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Vidcode, Inc. |
Television program transmission verification method and apparatus
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1983-04-11 |
1985-04-16 |
At&T Bell Laboratories |
Simultaneous transmission of speech and data over an analog channel
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1983-04-11 |
1985-06-11 |
At&T Bell Laboratories |
Simultaneous transmission of speech and data over an analog channel
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1983-05-13 |
1990-03-13 |
Philibert Alex C |
Document reproduction security system
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1983-05-31 |
1985-11-12 |
Horst Froessl |
Document and data handling and retrieval system
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SE463897B
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1983-07-01 |
1991-02-04 |
Esselte Security Syst Ab |
Foerfarande foer att saekra enkla koder
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1983-07-18 |
1987-01-13 |
Pitney Bowes Inc. |
System having a character generator for printing encrypted messages
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1983-07-18 |
1987-04-21 |
Pitney Bowes Inc. |
System for printing encrypted messages with bar-code representation
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1983-09-16 |
1987-10-27 |
Audicom Corporation |
Encoding of transmitted program material
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(en)
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1983-11-02 |
1985-06-18 |
General Electric Company |
In-line annular piston fixed bolt regenerative liquid propellant gun
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CH662989A5
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1983-11-16 |
1987-11-13 |
De La Rue Giori Sa |
Papier valeur.
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1983-12-27 |
1986-04-08 |
At&T Bell Laboratories |
Technique for insertion of digital data bursts into an adaptively encoded information bit stream
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1984-01-06 |
1986-10-21 |
Standard Change-Makers, Inc. |
Color-sensitive currency verifier
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CA1226914A
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1984-01-26 |
1987-09-15 |
The University Of British Columbia |
Modem for pseudo noise communication on a.c. lines
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1984-02-02 |
1988-06-07 |
Broadcast Advertisers Reports, Inc. |
Method and system for enabling television commerical monitoring using a marking signal superimposed over an audio signal
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JPS60171475A
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1984-02-15 |
1985-09-04 |
アイデンティフィケ−ション・デバイセス・インコ−ポレ−テッド |
識別システム
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1984-03-20 |
1987-06-09 |
Applied Spectrum Technologies, Inc. |
Data and voice communications system
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1984-04-26 |
1987-09-29 |
A. C. Nielsen Company |
Methods and apparatus for automatically identifying programs viewed or recorded
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(en)
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1984-04-30 |
1985-08-13 |
Crane & Co. |
Security paper
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(en)
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1984-05-29 |
1987-08-18 |
Kahn Leonard R |
Compatible AM broadcast/data transmisison system
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(en)
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1984-06-13 |
1985-11-12 |
Crane & Co. |
Security features in paper
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1984-06-28 |
1986-06-03 |
Henry Wurzburg |
Simultaneous voice and asynchronous data telephone
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1984-07-13 |
1986-01-30 |
Motorola, Inc. |
Cellular voice and data radiotelephone system
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FR2567947B1
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1984-07-23 |
1986-12-26 |
Euratom |
Systeme de controle d'acces a lecture de texture de surface
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1984-09-04 |
1987-05-05 |
Polaroid Corporation |
Optical storage identification card and read/write system
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1984-10-10 |
1986-12-09 |
Mars, Inc. |
Method and apparatus for currency validation
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EP0319524B1
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1984-10-10 |
1994-06-01 |
Mars Incorporated |
Method and apparatus for currency validation
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1984-12-31 |
1987-08-25 |
Light Signatures, Inc. |
Verification system for document substance and content
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JPS61169088A
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1985-01-22 |
1986-07-30 |
Nec Corp |
オ−デイオシンクロナイザ装置
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(en)
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1985-03-18 |
1990-06-26 |
Massachusetts Institute Of Technology |
Computationally efficient sine wave synthesis for acoustic waveform processing
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CN85100700A
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1985-04-01 |
1987-01-31 |
陆伯祥 |
计算机莫尔条纹证件及其识别系统
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US4647974A
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1985-04-12 |
1987-03-03 |
Rca Corporation |
Station signature system
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1985-04-19 |
1989-12-19 |
Oms, Inc. |
Modular software security
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1985-05-01 |
1994-11-22 |
Burlington Industries, Inc. |
Security protection for important documents and papers
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1985-05-08 |
1988-02-02 |
Kabushiki Kaisha Toshiba |
Image forming apparatus having a function for checking to copy a secret document
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DE3523809A1
(de)
|
1985-05-21 |
1986-11-27 |
Polygram Gmbh, 2000 Hamburg |
Verfahren zur zeitkompression von informationen in digitaler form
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1985-06-03 |
1990-12-25 |
Peter Ginkel |
Software protection and identification system
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*
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1985-06-17 |
1987-04-28 |
Materials Research, Inc. |
Process for incorporating a novel nuclear signature on currency which permits easy authentication at a later date
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1985-07-09 |
1987-07-07 |
Ncr Corporation |
Scanning control system for merchandise checkout
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US4682794A
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1985-07-22 |
1987-07-28 |
Photon Devices, Ltd. |
Secure identification card and system
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US4677466A
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|
1985-07-29 |
1987-06-30 |
A. C. Nielsen Company |
Broadcast program identification method and apparatus
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NL8502567A
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1985-09-19 |
1987-04-16 |
Bekaert Sa Nv |
Werkwijze en inrichting voor het op echtheid controleren van voorwerpen en voorwerp geschikt voor het toepassen van deze werkwijze.
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1985-10-07 |
1993-11-02 |
Canon Kabushiki Kaisha |
Data communication apparatus permitting confidential communication
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ES2038119T3
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1985-10-15 |
1993-07-16 |
Gao Gesellschaft Fur Automation Und Organisation Mbh |
Soporte de datos con caracteristica optica de autenticidad, asi como procedimiento para la fabricacion y comprobacion de dicho soporte de datos.
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US4652915A
(en)
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1985-11-12 |
1987-03-24 |
Control Data Corporation |
Method for polling headphones of a passive TV audience meter system
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US4712103A
(en)
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1985-12-03 |
1987-12-08 |
Motohiro Gotanda |
Door lock control system
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JPH0743825B2
(ja)
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1985-12-04 |
1995-05-15 |
ソニー株式会社 |
ダビング方式
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US4652015A
(en)
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1985-12-05 |
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Computer software protection
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Video effects system able to intersect a 3-D image with a 2-D image
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Security system for electronic printing systems
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Secure system for activating personal computer software at remote locations
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2010-01-05 |
Universite De Geneve |
Character and vector graphics watermark for structured electronic documents security
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US10687391B2
(en)
*
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2004-12-03 |
2020-06-16 |
Pressco Ip Llc |
Method and system for digital narrowband, wavelength specific cooking, curing, food preparation, and processing
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