FR54504E - Poste téléphonique à intercommunication - Google Patents
Poste téléphonique à intercommunicationInfo
- Publication number
- FR54504E FR54504E FR54504DA FR54504E FR 54504 E FR54504 E FR 54504E FR 54504D A FR54504D A FR 54504DA FR 54504 E FR54504 E FR 54504E
- Authority
- FR
- France
- Prior art keywords
- telephone set
- intercom telephone
- intercom
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR54504T | 1946-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR54504E true FR54504E (fr) | 1950-05-04 |
Family
ID=8688952
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR923568D Expired FR923568A (fr) | 1946-04-03 | 1946-02-02 | Poste téléphonique à intercommunication |
| FR54504D Expired FR54504E (fr) | 1946-04-03 | 1946-04-03 | Poste téléphonique à intercommunication |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR923568D Expired FR923568A (fr) | 1946-04-03 | 1946-02-02 | Poste téléphonique à intercommunication |
Country Status (1)
| Country | Link |
|---|---|
| FR (2) | FR923568A (fr) |
-
1946
- 1946-02-02 FR FR923568D patent/FR923568A/fr not_active Expired
- 1946-04-03 FR FR54504D patent/FR54504E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR923568A (fr) | 1947-07-10 |
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