FR706846A - Safety device for automatic telephone apparatus - Google Patents
Safety device for automatic telephone apparatusInfo
- Publication number
- FR706846A FR706846A FR706846DA FR706846A FR 706846 A FR706846 A FR 706846A FR 706846D A FR706846D A FR 706846DA FR 706846 A FR706846 A FR 706846A
- Authority
- FR
- France
- Prior art keywords
- safety device
- telephone apparatus
- automatic telephone
- automatic
- safety
- 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
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
- H04M17/026—Constructional features
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE374822X | 1929-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR706846A true FR706846A (en) | 1931-06-30 |
Family
ID=3868622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR706846D Expired FR706846A (en) | 1929-12-09 | 1930-12-02 | Safety device for automatic telephone apparatus |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE366093A (en) |
FR (1) | FR706846A (en) |
GB (1) | GB374822A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3365554A (en) * | 1964-10-16 | 1968-01-23 | Bell Telephone Labor Inc | Prevention of dialing by a telephone switchhook |
-
0
- BE BE366093D patent/BE366093A/xx unknown
-
1930
- 1930-12-02 FR FR706846D patent/FR706846A/en not_active Expired
- 1930-12-08 GB GB36987/30A patent/GB374822A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB374822A (en) | 1932-06-16 |
BE366093A (en) |
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