FR464085A - Locking system for phones - Google Patents
Locking system for phonesInfo
- Publication number
- FR464085A FR464085A FR464085A FR464085DA FR464085A FR 464085 A FR464085 A FR 464085A FR 464085 A FR464085 A FR 464085A FR 464085D A FR464085D A FR 464085DA FR 464085 A FR464085 A FR 464085A
- Authority
- FR
- France
- Prior art keywords
- phones
- locking system
- locking
- 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
- H04M1/68—Circuit arrangements for preventing eavesdropping
- H04M1/70—Lock-out or secrecy arrangements in party-line systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191318160T | 1913-08-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR464085A true FR464085A (en) | 1914-03-12 |
Family
ID=34359795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR464085A Expired FR464085A (en) | 1913-08-09 | 1913-10-14 | Locking system for phones |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR464085A (en) |
GB (1) | GB191318160A (en) |
-
1913
- 1913-08-09 GB GB191318160D patent/GB191318160A/en not_active Expired
- 1913-10-14 FR FR464085A patent/FR464085A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB191318160A (en) | 1914-03-19 |
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