BE378412A - - Google Patents
Info
- Publication number
- BE378412A BE378412A BE378412DA BE378412A BE 378412 A BE378412 A BE 378412A BE 378412D A BE378412D A BE 378412DA BE 378412 A BE378412 A BE 378412A
- Authority
- BE
- Belgium
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
- H04M17/023—Circuit arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Prepayment Telephone Systems (AREA)
- Meter Arrangements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE374952X | 1930-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE378412A true BE378412A (da) |
Family
ID=20309104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE378412D BE378412A (da) | 1930-03-21 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1868378A (da) |
| BE (1) | BE378412A (da) |
| DE (1) | DE610040C (da) |
| FR (1) | FR713496A (da) |
| GB (1) | GB374952A (da) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2707724A (en) * | 1952-10-07 | 1955-05-03 | Automatic Elect Lab | Coin control circuit for postpay telephone paystations |
-
0
- BE BE378412D patent/BE378412A/xx unknown
-
1931
- 1931-03-13 US US522462A patent/US1868378A/en not_active Expired - Lifetime
- 1931-03-18 FR FR713496D patent/FR713496A/fr not_active Expired
- 1931-03-19 GB GB8514/31A patent/GB374952A/en not_active Expired
- 1931-03-20 DE DET38570D patent/DE610040C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB374952A (en) | 1932-06-20 |
| DE610040C (de) | 1935-03-05 |
| FR713496A (fr) | 1931-10-28 |
| US1868378A (en) | 1932-07-19 |