FR672514A - Installation téléphonique - Google Patents
Installation téléphoniqueInfo
- Publication number
- FR672514A FR672514A FR672514DA FR672514A FR 672514 A FR672514 A FR 672514A FR 672514D A FR672514D A FR 672514DA FR 672514 A FR672514 A FR 672514A
- Authority
- FR
- France
- Prior art keywords
- telephone installation
- telephone
- installation
- 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
- H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US199917A US1752543A (en) | 1927-06-20 | 1927-06-20 | Telephone system |
Publications (1)
Publication Number | Publication Date |
---|---|
FR672514A true FR672514A (fr) | 1929-12-30 |
Family
ID=22739554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR672514D Expired FR672514A (fr) | 1927-06-20 | 1928-05-25 | Installation téléphonique |
Country Status (3)
Country | Link |
---|---|
US (1) | US1752543A (fr) |
FR (1) | FR672514A (fr) |
GB (1) | GB292498A (fr) |
-
1927
- 1927-06-20 US US199917A patent/US1752543A/en not_active Expired - Lifetime
-
1928
- 1928-04-28 GB GB12502/28A patent/GB292498A/en not_active Expired
- 1928-05-25 FR FR672514D patent/FR672514A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB292498A (en) | 1929-07-29 |
US1752543A (en) | 1930-04-01 |
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