|
US4193030A
(en)
*
|
1968-08-01 |
1980-03-11 |
International Telephone And Telegraph Corporation |
Frequency hopping communication system
|
|
US3696207A
(en)
*
|
1969-05-14 |
1972-10-03 |
Philips Corp |
System for the transmission of intelligence by means of scrambled audiosignals
|
|
FR2416597A1
(fr)
*
|
1971-12-09 |
1979-08-31 |
Berger Claude |
Procede de codage d'un signal
|
|
FR2405601A1
(fr)
*
|
1975-12-18 |
1979-05-04 |
Trt Telecom Radio Electr |
Systeme radioelectrique de transmission d'informations par modulation d'une porteuse a frequence variable par sauts
|
|
US4159399A
(en)
*
|
1976-09-29 |
1979-06-26 |
Tokyo Shibaura Electric Co., Ltd. |
Security communication system using polarity inversion
|
|
US4133977A
(en)
*
|
1977-02-25 |
1979-01-09 |
Lear Siegler, Inc. |
Voice scrambler using syllabic masking
|
|
DE2737576C1
(de)
*
|
1977-08-22 |
1986-01-09 |
Siemens AG, 1000 Berlin und 8000 München |
Militaerisches Radar- oder Funk-Nachrichtenuebertragungssystem
|
|
US4276652A
(en)
*
|
1978-10-02 |
1981-06-30 |
Technical Communications Corp. |
Secure communication system with improved frequency-hopping arrangement
|
|
US4379947A
(en)
*
|
1979-02-02 |
1983-04-12 |
Teleprompter Corporation |
System for transmitting data simultaneously with audio
|
|
US4417349A
(en)
*
|
1979-11-08 |
1983-11-22 |
Digital Broadcasting Corporation |
SCA Data transmission system with a raised cosine filter
|
|
US4425661A
(en)
|
1981-09-03 |
1984-01-10 |
Applied Spectrum Technologies, Inc. |
Data under voice communications system
|
|
FR2520955B1
(fr)
*
|
1982-01-29 |
1987-11-13 |
Radiotechnique |
Systeme electronique de transmission secrete de signaux audio
|
|
FR2530101A1
(fr)
*
|
1982-07-06 |
1984-01-13 |
Thomson Brandt |
Procede et systeme de transmission cryptee d'un signal, notamment audio-frequence
|
|
US4581765A
(en)
*
|
1983-02-14 |
1986-04-08 |
Matsushita Electric Industrial Co., Ltd. |
Information security system
|
|
US4790009A
(en)
*
|
1984-10-29 |
1988-12-06 |
Victor Company Of Japan, Ltd. |
Scrambler system
|
|
FR2580885B1
(fr)
*
|
1985-04-19 |
1988-07-08 |
Radiotechnique |
Systeme pour la transmission secrete de signaux audio, et televiseur pour la reception de tels signaux
|
|
US4654859A
(en)
*
|
1986-04-09 |
1987-03-31 |
Racal Data Communications Inc. |
Frequency synthesizer for frequency hopping communication system
|
|
US4827507A
(en)
*
|
1987-06-19 |
1989-05-02 |
Motorola, Inc. |
Duplex analog scrambler
|
|
GB2207328A
(en)
*
|
1987-07-20 |
1989-01-25 |
British Broadcasting Corp |
Scrambling of analogue electrical signals
|
|
US5038402A
(en)
*
|
1988-12-06 |
1991-08-06 |
General Instrument Corporation |
Apparatus and method for providing digital audio in the FM broadcast band
|
|
FR2645692B1
(fr)
*
|
1989-03-20 |
1992-08-14 |
Cuvelier Antoine |
Systeme pour la transmission secrete de signaux audio : cryptophonie par inversion de spectre. television, radio, telephone suivant le procede. dispositifs pour realiser des codeurs ou des decodeurs
|
|
US5430759A
(en)
*
|
1992-08-20 |
1995-07-04 |
Nexus 1994 Limited |
Low-power frequency-hopped spread spectrum reverse paging system
|
|
IL104264A
(en)
*
|
1992-08-20 |
1996-07-23 |
Nexus Telecomm Syst |
Remote position detrmination system
|
|
US5335246A
(en)
*
|
1992-08-20 |
1994-08-02 |
Nexus Telecommunication Systems, Ltd. |
Pager with reverse paging facility
|
|
US5528692A
(en)
*
|
1994-05-03 |
1996-06-18 |
Motorola, Inc. |
Frequency inversion scrambler with integrated high-pass filter having autozero to remove internal DC offset
|