BE459652A - - Google Patents
Info
- Publication number
- BE459652A BE459652A BE459652DA BE459652A BE 459652 A BE459652 A BE 459652A BE 459652D A BE459652D A BE 459652DA BE 459652 A BE459652 A BE 459652A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR992091T | 1944-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE459652A true BE459652A (en:Method) | 1945-09-29 |
Family
ID=9554475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE459652D BE459652A (en:Method) | 1944-05-08 | 1942-08-11 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2509716A (en:Method) |
| BE (1) | BE459652A (en:Method) |
| CH (1) | CH251551A (en:Method) |
| ES (1) | ES172938A1 (en:Method) |
| FR (1) | FR992091A (en:Method) |
| GB (1) | GB614572A (en:Method) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2671165A (en) * | 1950-02-16 | 1954-03-02 | Gilpin Electronics Inc | System of radio or television broadcasting or transmission |
| US4058677A (en) * | 1974-04-26 | 1977-11-15 | Lear Siegler, Inc. | Sound scrambling equipment |
| US4280020A (en) | 1979-01-09 | 1981-07-21 | Essex County Council | Radio telephone system with direct digital carrier modulation for data transmission |
| US4581765A (en) * | 1983-02-14 | 1986-04-08 | Matsushita Electric Industrial Co., Ltd. | Information security system |
| US5949878A (en) * | 1996-06-28 | 1999-09-07 | Transcrypt International, Inc. | Method and apparatus for providing voice privacy in electronic communication systems |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1502889A (en) * | 1918-01-08 | 1924-07-29 | Western Electric Co | Method of and system for radiosignaling |
| US1495470A (en) * | 1922-02-01 | 1924-05-27 | Western Electric Co | High-frequency transmission |
| US1542565A (en) * | 1923-06-30 | 1925-06-16 | Western Electric Co | Secret signaling |
| US1641431A (en) * | 1925-12-15 | 1927-09-06 | Western Electric Co | Communication system |
| DE609540C (de) * | 1930-01-02 | 1935-02-20 | Int Standard Electric Corp | Anlage fuer Hochfrequenznachrichtenuebermittlung mit gespreizten Seitenbaendern |
| US1992441A (en) * | 1930-09-06 | 1935-02-26 | John Hays Hammond Jr | Single side band transmission and reception |
| US2095050A (en) * | 1933-04-26 | 1937-10-05 | Rca Corp | Signaling |
| BE415104A (en:Method) * | 1935-04-30 | |||
| NL64998C (en:Method) * | 1937-08-11 | |||
| US2270899A (en) * | 1938-11-12 | 1942-01-27 | Gen Electric | Frequency modulation system |
| US2399469A (en) * | 1940-07-31 | 1946-04-30 | Gen Electric | Secret signaling system |
| US2309678A (en) * | 1940-08-31 | 1943-02-02 | Rca Corp | Frequency modulation system |
| US2358382A (en) * | 1941-08-29 | 1944-09-19 | Rca Corp | Frequency modulation signal system |
| US2398694A (en) * | 1942-03-20 | 1946-04-16 | Hazeltine Corp | Carrier-wave generating system |
| US2395432A (en) * | 1943-11-19 | 1946-02-26 | Press Wireless Inc | Secrecy signaling system, method, and apparatus |
-
1942
- 1942-08-11 BE BE459652D patent/BE459652A/xx unknown
-
1944
- 1944-05-08 FR FR992091D patent/FR992091A/fr not_active Expired
-
1945
- 1945-08-03 CH CH251551D patent/CH251551A/fr unknown
-
1946
- 1946-03-18 ES ES172938A patent/ES172938A1/es not_active Expired
- 1946-07-12 GB GB20963/46A patent/GB614572A/en not_active Expired
-
1947
- 1947-05-02 US US745624A patent/US2509716A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CH251551A (fr) | 1947-10-31 |
| GB614572A (en) | 1948-12-17 |
| US2509716A (en) | 1950-05-30 |
| ES172938A1 (es) | 1946-04-16 |
| FR992091A (fr) | 1951-10-15 |