CH262449A - Automatic telephone system. - Google Patents
Automatic telephone system.Info
- Publication number
- CH262449A CH262449A CH262449DA CH262449A CH 262449 A CH262449 A CH 262449A CH 262449D A CH262449D A CH 262449DA CH 262449 A CH262449 A CH 262449A
- Authority
- CH
- Switzerland
- Prior art keywords
- telephone system
- automatic telephone
- automatic
- telephone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US582195A US2426210A (en) | 1945-03-12 | 1945-03-12 | Intercept operator's position for unassigned party line stations |
Publications (1)
Publication Number | Publication Date |
---|---|
CH262449A true CH262449A (en) | 1949-06-30 |
Family
ID=24328192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH262449D CH262449A (en) | 1945-03-12 | 1947-07-12 | Automatic telephone system. |
Country Status (5)
Country | Link |
---|---|
US (1) | US2426210A (en) |
CH (1) | CH262449A (en) |
ES (1) | ES173251A1 (en) |
FR (1) | FR923733A (en) |
NL (1) | NL76335C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2871300A (en) * | 1953-03-12 | 1959-01-27 | Itt | Intercept discriminator |
US3909543A (en) * | 1974-01-17 | 1975-09-30 | Itt | Disconnector circuit arrangement |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1727137A (en) * | 1925-12-21 | 1929-09-03 | Automatic Electric Inc | Automatic telephone system |
US1738059A (en) * | 1926-09-22 | 1929-12-03 | Automatic Electric Inc | Telephone system |
US2224497A (en) * | 1939-04-15 | 1940-12-10 | Associated Electric Lab Inc | Telephone system |
US2300186A (en) * | 1941-03-29 | 1942-10-27 | Kellogg Switchboard & Supply | Telephone system |
US2344634A (en) * | 1942-01-08 | 1944-03-21 | Stromberg Carlson Telephone | Telephone intercept system |
-
0
- NL NL76335D patent/NL76335C/xx active
-
1945
- 1945-03-12 US US582195A patent/US2426210A/en not_active Expired - Lifetime
-
1946
- 1946-03-12 FR FR923733D patent/FR923733A/en not_active Expired
- 1946-04-17 ES ES173251A patent/ES173251A1/en not_active Expired
-
1947
- 1947-07-12 CH CH262449D patent/CH262449A/en unknown
Also Published As
Publication number | Publication date |
---|---|
US2426210A (en) | 1947-08-26 |
FR923733A (en) | 1947-07-16 |
ES173251A1 (en) | 1946-05-16 |
NL76335C (en) |
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