BE477658A - - Google Patents
Info
- Publication number
- BE477658A BE477658A BE477658DA BE477658A BE 477658 A BE477658 A BE 477658A BE 477658D A BE477658D A BE 477658DA BE 477658 A BE477658 A BE 477658A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8643/41A GB580167A (en) | 1941-07-09 | 1941-07-09 | Improvements in or relating to secret transmission systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE477658A true BE477658A (en:Method) |
Family
ID=9856430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE477658D BE477658A (en:Method) | 1941-07-09 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2406841A (en:Method) |
| BE (1) | BE477658A (en:Method) |
| ES (1) | ES176097A1 (en:Method) |
| FR (1) | FR932703A (en:Method) |
| GB (1) | GB580167A (en:Method) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466959A (en) * | 1944-09-30 | 1949-04-12 | Philco Corp | Radio receiver noise discriminating circuit |
| US2953643A (en) * | 1945-05-10 | 1960-09-20 | Bell Telephone Labor Inc | Inverted speech privacy using irregular inverting wave form |
| US2521690A (en) * | 1945-08-14 | 1950-09-12 | Standard Telephones Cables Ltd | Secrecy preserving signaling system |
| US2556677A (en) * | 1946-05-10 | 1951-06-12 | Bell Telephone Labor Inc | Secret communication system |
| US2510046A (en) * | 1947-04-18 | 1950-05-30 | Zenith Radio Corp | Radio-wire signaling system |
| US2660666A (en) * | 1950-01-05 | 1953-11-24 | Westinghouse Electric Corp | Secrecy transmission system |
| US4176316A (en) * | 1953-03-30 | 1979-11-27 | International Telephone & Telegraph Corp. | Secure single sideband communication system using modulated noise subcarrier |
| USRE34004E (en) * | 1953-03-30 | 1992-07-21 | Itt Corporation | Secure single sideband communication system using modulated noise subcarrier |
| US3225142A (en) * | 1961-12-18 | 1965-12-21 | Bell Telephone Labor Inc | Privacy system |
| US4361729A (en) * | 1968-01-24 | 1982-11-30 | American Standard Inc. | Narrowband analog message privacy system |
| US4805216A (en) * | 1987-01-08 | 1989-02-14 | Compfax Corporation | Method and apparatus for continuously acknowledged link encrypting |
-
0
- BE BE477658D patent/BE477658A/xx unknown
-
1941
- 1941-07-09 GB GB8643/41A patent/GB580167A/en not_active Expired
-
1942
- 1942-09-11 US US458061A patent/US2406841A/en not_active Expired - Lifetime
-
1946
- 1946-08-24 FR FR932703D patent/FR932703A/fr not_active Expired
- 1946-12-14 ES ES0176097A patent/ES176097A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR932703A (fr) | 1948-03-31 |
| ES176097A1 (es) | 1947-01-16 |
| US2406841A (en) | 1946-09-03 |
| GB580167A (en) | 1946-08-29 |