NL33817C - - Google Patents
Info
- Publication number
- NL33817C NL33817C NL33817DA NL33817C NL 33817 C NL33817 C NL 33817C NL 33817D A NL33817D A NL 33817DA NL 33817 C NL33817 C NL 33817C
- Authority
- NL
- Netherlands
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET38770D DE643764C (de) | 1931-04-30 | 1931-04-30 | Schaltungsanordnung fuer Selbstanschlussfernsprechstellen beschraenkter Verkehrsmoeglichkeit, insbesondere fuer Muenzfernsprecher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL33817C true NL33817C (en:Method) |
Family
ID=7560296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL33817D NL33817C (en:Method) | 1931-04-30 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE643764C (en:Method) |
| NL (1) | NL33817C (en:Method) |
-
0
- NL NL33817D patent/NL33817C/xx active
-
1931
- 1931-04-30 DE DET38770D patent/DE643764C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE643764C (de) | 1937-04-17 |