FR932910A - Improvements to telephone or similar devices - Google Patents
Improvements to telephone or similar devicesInfo
- Publication number
- FR932910A FR932910A FR932910DA FR932910A FR 932910 A FR932910 A FR 932910A FR 932910D A FR932910D A FR 932910DA FR 932910 A FR932910 A FR 932910A
- Authority
- FR
- France
- Prior art keywords
- telephone
- similar devices
- similar
- devices
- Prior art date
- 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
- H04Q3/0016—Arrangements providing connection between exchanges
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2401/43A GB563504A (en) | 1943-02-13 | 1943-02-13 | Improvements in telephone or like systems |
Publications (1)
Publication Number | Publication Date |
---|---|
FR932910A true FR932910A (en) | 1948-04-06 |
Family
ID=9738900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR932910D Expired FR932910A (en) | 1943-02-13 | 1946-08-27 | Improvements to telephone or similar devices |
Country Status (4)
Country | Link |
---|---|
US (1) | US2383541A (en) |
FR (1) | FR932910A (en) |
GB (1) | GB563504A (en) |
NL (1) | NL64785C (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE467392A (en) * | 1944-05-05 | |||
US2594719A (en) * | 1945-05-19 | 1952-04-29 | Automatic Elect Lab | Voice-frequency telephone signaling system |
US2468299A (en) * | 1945-07-07 | 1949-04-26 | Bell Telephone Labor Inc | Supervisory signaling in telephone or like switching systems |
US2557388A (en) * | 1947-05-28 | 1951-06-19 | Automatic Elect Lab | Automatic telephone system employing finder switches for connecting calling lines tonumerical switches |
US2655652A (en) * | 1948-06-28 | 1953-10-13 | John H Homrighous | Multiplex time division telephone systems |
-
0
- NL NL64785D patent/NL64785C/xx active
-
1943
- 1943-02-13 GB GB2401/43A patent/GB563504A/en not_active Expired
- 1943-12-31 US US516322A patent/US2383541A/en not_active Expired - Lifetime
-
1946
- 1946-08-27 FR FR932910D patent/FR932910A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2383541A (en) | 1945-08-28 |
NL64785C (en) | |
GB563504A (en) | 1944-08-17 |
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