FR803168A - Improvements to telephone systems - Google Patents
Improvements to telephone systemsInfo
- Publication number
- FR803168A FR803168A FR803168DA FR803168A FR 803168 A FR803168 A FR 803168A FR 803168D A FR803168D A FR 803168DA FR 803168 A FR803168 A FR 803168A
- Authority
- FR
- France
- Prior art keywords
- telephone systems
- telephone
- systems
- 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 |
---|---|---|---|
US751805A US2040637A (en) | 1934-11-07 | 1934-11-07 | Telephone system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR803168A true FR803168A (en) | 1936-09-24 |
Family
ID=25023550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR803168D Expired FR803168A (en) | 1934-11-07 | 1935-11-07 | Improvements to telephone systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US2040637A (en) |
FR (1) | FR803168A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2707211A (en) * | 1951-03-30 | 1955-04-26 | Itt | Adapter circuit |
-
1934
- 1934-11-07 US US751805A patent/US2040637A/en not_active Expired - Lifetime
-
1935
- 1935-11-07 FR FR803168D patent/FR803168A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2040637A (en) | 1936-05-12 |
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