FR753279A - Improvements to automatic telephone systems - Google Patents
Improvements to automatic telephone systemsInfo
- Publication number
- FR753279A FR753279A FR753279DA FR753279A FR 753279 A FR753279 A FR 753279A FR 753279D A FR753279D A FR 753279DA FR 753279 A FR753279 A FR 753279A
- Authority
- FR
- France
- Prior art keywords
- telephone systems
- automatic telephone
- automatic
- systems
- telephone
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE753279X | 1932-04-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR753279A true FR753279A (en) | 1933-10-12 |
Family
ID=20326522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR753279D Expired FR753279A (en) | 1932-04-01 | 1933-03-30 | Improvements to automatic telephone systems |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR753279A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741283C (en) * | 1938-10-15 | 1943-11-09 | Siemens Ag | Circuit arrangement for telephone systems with double-directional, sealed off connecting lines |
-
1933
- 1933-03-30 FR FR753279D patent/FR753279A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741283C (en) * | 1938-10-15 | 1943-11-09 | Siemens Ag | Circuit arrangement for telephone systems with double-directional, sealed off connecting lines |
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