BE387820A - - Google Patents
Info
- Publication number
- BE387820A BE387820A BE387820DA BE387820A BE 387820 A BE387820 A BE 387820A BE 387820D A BE387820D A BE 387820DA BE 387820 A BE387820 A BE 387820A
- 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)
- Prepayment Telephone Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE399565X | 1931-04-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE387820A true BE387820A (https=) |
Family
ID=20309411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE387820D BE387820A (https=) | 1931-04-14 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE387820A (https=) |
| FR (1) | FR735136A (https=) |
| GB (1) | GB399565A (https=) |
-
0
- BE BE387820D patent/BE387820A/xx unknown
-
1932
- 1932-04-12 GB GB10466/32A patent/GB399565A/en not_active Expired
- 1932-04-12 FR FR735136D patent/FR735136A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR735136A (fr) | 1932-11-03 |
| GB399565A (en) | 1933-10-12 |