BE439637A - - Google Patents
Info
- Publication number
- BE439637A BE439637A BE439637DA BE439637A BE 439637 A BE439637 A BE 439637A BE 439637D A BE439637D A BE 439637DA BE 439637 A BE439637 A BE 439637A
- Authority
- BE
- Belgium
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 |
|---|---|
| BE439637A true BE439637A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=26959081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE439637D BE439637A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1939-06-10 |
Country Status (5)
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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 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 |
|---|---|
| GB542643A (en) | 1942-01-21 |
| FR866096A (fr) | 1941-06-16 |
| US2332643A (en) | 1943-10-26 |
| CH222392A (fr) | 1942-07-15 |
| GB544364A (en) | 1942-04-09 |