CH574692A5 - - Google Patents
Info
- Publication number
- CH574692A5 CH574692A5 CH202673A CH202673A CH574692A5 CH 574692 A5 CH574692 A5 CH 574692A5 CH 202673 A CH202673 A CH 202673A CH 202673 A CH202673 A CH 202673A CH 574692 A5 CH574692 A5 CH 574692A5
- Authority
- CH
- Switzerland
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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH202673A CH574692A5 (enrdf_load_stackoverflow) | 1973-02-13 | 1973-02-13 | |
| DE2318489A DE2318489C3 (de) | 1973-02-13 | 1973-04-12 | Verfahren und Anordnung zum verschleierten Übertragen einer gesprochenen Information über einen Telephoniekanal |
| SE7400265A SE392556B (sv) | 1973-02-13 | 1974-01-09 | Sett att maskera, senda, mottaga och demaskera talinformation samt anleggning for genomforande av settet |
| NL7401441A NL7401441A (enrdf_load_stackoverflow) | 1973-02-13 | 1974-02-01 | |
| NO740416A NO140401C (no) | 1973-02-13 | 1974-02-07 | Fremgangsmaate til og anlegg for utydeliggjoering, sending, mottakning og tydeliggjoering av taleinformasjon |
| GB641174A GB1465393A (en) | 1973-02-13 | 1974-02-12 | Method and apparatus for the scrambled transmission of speech via a telephony channel |
| FR7404708A FR2217875B1 (enrdf_load_stackoverflow) | 1973-02-13 | 1974-02-12 | |
| ZA740916A ZA74916B (en) | 1973-02-13 | 1974-02-12 | Method and apparatus for the scrambled transmission of spoken information via a telephony channel |
| CA192,326A CA1003137A (en) | 1973-02-13 | 1974-02-12 | Method and apparatus for the scrambled transmission of spoken information via a telephony channel |
| JP49017525A JPS49119502A (enrdf_load_stackoverflow) | 1973-02-13 | 1974-02-13 | |
| IT20723/74A IT1019573B (it) | 1973-02-13 | 1974-04-08 | Apparecchiatura per la trasmissione mascherata di un messaggio in parole attraverso un canale telefonico |
| US05/660,925 US4068094A (en) | 1973-02-13 | 1976-02-24 | Method and apparatus for the scrambled transmission of spoken information via a telephony channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH202673A CH574692A5 (enrdf_load_stackoverflow) | 1973-02-13 | 1973-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH574692A5 true CH574692A5 (enrdf_load_stackoverflow) | 1976-04-15 |
Family
ID=4224178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH202673A CH574692A5 (enrdf_load_stackoverflow) | 1973-02-13 | 1973-02-13 |
Country Status (11)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2318247C3 (de) * | 1973-04-11 | 1981-03-26 | Siemens AG, 1000 Berlin und 8000 München | Einrichtung zur verschleierten Übertragung von Sprachsignalen |
| JPS5824984B2 (ja) * | 1976-06-02 | 1983-05-24 | 三菱電機株式会社 | 秘話装置 |
| CN115529214B (zh) * | 2022-08-19 | 2025-05-02 | 北京邮电大学 | 加扰互补码正交频分复用通感一体化信号设计方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1620656A (en) * | 1924-12-01 | 1927-03-15 | Western Electric Co | Carrier-wave signaling system |
| US3201517A (en) * | 1944-04-12 | 1965-08-17 | Bell Telephone Labor Inc | Privacy communication system |
| FR977153A (fr) * | 1948-10-27 | 1951-03-28 | Radio Electr Soc Fr | Système de communication téléphonique à secret |
| FR1169671A (fr) * | 1957-03-08 | 1959-01-05 | Thomson Houston Comp Francaise | Perfectionnements aux systèmes de communications téléphoniques |
| CH361597A (de) * | 1958-08-23 | 1962-04-30 | Patelhold Patentverwertung | Verfahren zur Verschleierung von Nachrichtensignalen |
| US3225142A (en) * | 1961-12-18 | 1965-12-21 | Bell Telephone Labor Inc | Privacy system |
| FR95619E (fr) * | 1966-05-05 | 1971-03-26 | It Telecommunicazioni Siemens | Systeme de transmission de signaux téléphoniques a allocation de temps. |
| CH499932A (de) * | 1968-02-12 | 1970-11-30 | Patelhold Patentverwertung | Synchronisierverfahren für programmgesteuerte Trägerumtastung |
| CH518658A (de) * | 1970-07-07 | 1972-01-31 | Patelhold Patentverwaltungs Un | Verfahren zur verschlüsselten Nachrichtenübermittlung durch zeitliche Vertauschung von Informationselementen |
| FR2129013A5 (enrdf_load_stackoverflow) * | 1971-03-11 | 1972-10-27 | Snecma |
-
1973
- 1973-02-13 CH CH202673A patent/CH574692A5/xx not_active IP Right Cessation
- 1973-04-12 DE DE2318489A patent/DE2318489C3/de not_active Expired
-
1974
- 1974-01-09 SE SE7400265A patent/SE392556B/xx unknown
- 1974-02-01 NL NL7401441A patent/NL7401441A/xx not_active Application Discontinuation
- 1974-02-07 NO NO740416A patent/NO140401C/no unknown
- 1974-02-12 ZA ZA740916A patent/ZA74916B/xx unknown
- 1974-02-12 GB GB641174A patent/GB1465393A/en not_active Expired
- 1974-02-12 CA CA192,326A patent/CA1003137A/en not_active Expired
- 1974-02-12 FR FR7404708A patent/FR2217875B1/fr not_active Expired
- 1974-02-13 JP JP49017525A patent/JPS49119502A/ja active Pending
- 1974-04-08 IT IT20723/74A patent/IT1019573B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| DE2318489C3 (de) | 1982-12-23 |
| SE392556B (sv) | 1977-03-28 |
| NO140401C (no) | 1979-08-22 |
| NO140401B (no) | 1979-05-14 |
| NL7401441A (enrdf_load_stackoverflow) | 1974-08-15 |
| FR2217875B1 (enrdf_load_stackoverflow) | 1978-05-12 |
| DE2318489B2 (de) | 1979-05-03 |
| IT1019573B (it) | 1977-11-30 |
| DE2318489A1 (de) | 1974-08-15 |
| CA1003137A (en) | 1977-01-04 |
| NO740416L (no) | 1974-08-14 |
| FR2217875A1 (enrdf_load_stackoverflow) | 1974-09-06 |
| JPS49119502A (enrdf_load_stackoverflow) | 1974-11-15 |
| GB1465393A (en) | 1977-02-23 |
| ZA74916B (en) | 1974-12-24 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |