CH222392A - Circuit de poste téléphonique. - Google Patents
Circuit de poste téléphonique.Info
- Publication number
- CH222392A CH222392A CH222392DA CH222392A CH 222392 A CH222392 A CH 222392A CH 222392D A CH222392D A CH 222392DA CH 222392 A CH222392 A CH 222392A
- Authority
- CH
- Switzerland
- Prior art keywords
- telephone set
- set circuit
- circuit
- telephone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US278411A US2287998A (en) | 1939-06-10 | 1939-06-10 | Telephone circuit |
US434372A US2332643A (en) | 1939-06-10 | 1942-03-12 | Telephone set circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
CH222392A true CH222392A (fr) | 1942-07-15 |
Family
ID=26959081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH222392D CH222392A (fr) | 1939-06-10 | 1940-10-11 | Circuit de poste téléphonique. |
Country Status (5)
Country | Link |
---|---|
US (1) | US2332643A (fr) |
BE (1) | BE439637A (fr) |
CH (1) | CH222392A (fr) |
FR (1) | FR866096A (fr) |
GB (2) | GB544364A (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2559778A (en) * | 1948-04-02 | 1951-07-10 | Modern Telephone Corp | Intercommunication telephone system |
DE886766C (de) * | 1951-03-03 | 1953-08-17 | Normalzeit G M B H | Einrichtung zur Verhinderung des unerlaubten Abhoerens von Telephongespraechen |
US2764731A (en) * | 1953-05-06 | 1956-09-25 | Bell Telephone Labor Inc | Thermistor network |
DE1016760B (de) * | 1953-07-07 | 1957-10-03 | Deutsche Bundespost | Schaltungsanordnung zur Volumenregelung in Fernsprechteilnehmer-Anschlussleitungen |
NL215808A (fr) * | 1956-03-29 | |||
US3143700A (en) * | 1960-08-12 | 1964-08-04 | Computing Devices Canada | Resistance networks for stabilizing phase shift in resolvers and the like |
-
0
- BE BE439637D patent/BE439637A/xx unknown
-
1940
- 1940-05-17 GB GB12490/41A patent/GB544364A/en not_active Expired
- 1940-05-17 GB GB8841/40A patent/GB542643A/en not_active Expired
- 1940-06-08 FR FR866096D patent/FR866096A/fr not_active Expired
- 1940-10-11 CH CH222392D patent/CH222392A/fr unknown
-
1942
- 1942-03-12 US US434372A patent/US2332643A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR866096A (fr) | 1941-06-16 |
BE439637A (fr) | |
US2332643A (en) | 1943-10-26 |
GB542643A (en) | 1942-01-21 |
GB544364A (en) | 1942-04-09 |
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