FR720400A - Compteur de communications téléphoniques - Google Patents
Compteur de communications téléphoniquesInfo
- Publication number
- FR720400A FR720400A FR720400DA FR720400A FR 720400 A FR720400 A FR 720400A FR 720400D A FR720400D A FR 720400DA FR 720400 A FR720400 A FR 720400A
- Authority
- FR
- France
- Prior art keywords
- telephone communications
- communications counter
- counter
- telephone
- communications
- 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
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/56—Arrangements for indicating or recording the called number at the calling subscriber's set
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR720400T | 1931-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR720400A true FR720400A (fr) | 1932-02-18 |
Family
ID=9093103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR720400D Expired FR720400A (fr) | 1931-07-22 | 1931-07-22 | Compteur de communications téléphoniques |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR720400A (fr) |
-
1931
- 1931-07-22 FR FR720400D patent/FR720400A/fr not_active Expired
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