FR744153A - - Google Patents
Info
- Publication number
- FR744153A FR744153A FR744153DA FR744153A FR 744153 A FR744153 A FR 744153A FR 744153D A FR744153D A FR 744153DA FR 744153 A FR744153 A FR 744153A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US573662A US1914358A (en) | 1931-11-07 | 1931-11-07 | Telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR744153A true FR744153A (en) | 1933-04-13 |
Family
ID=24292886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR744153D Expired FR744153A (en) | 1931-11-07 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1914358A (en) |
| FR (1) | FR744153A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE467075A (en) * | 1944-02-23 | |||
| NL67517C (en) * | 1947-04-24 | |||
| US2628283A (en) * | 1948-09-16 | 1953-02-10 | Bell Telephone Labor Inc | Semiautomatic telephone switching system arranged for selective alternating current or direct current key pulsing |
-
0
- FR FR744153D patent/FR744153A/fr not_active Expired
-
1931
- 1931-11-07 US US573662A patent/US1914358A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1914358A (en) | 1933-06-20 |