NL29441C - - Google Patents
Info
- Publication number
- NL29441C NL29441C NL29441DA NL29441C NL 29441 C NL29441 C NL 29441C NL 29441D A NL29441D A NL 29441DA NL 29441 C NL29441 C NL 29441C
- 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)
- Prepayment Telephone Systems (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET40511D DE581835C (de) | 1929-11-14 | 1929-11-14 | Schaltungsanordnung fuer Muenzfernsprecher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL29441C true NL29441C (en:Method) |
Family
ID=7560777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL29441D NL29441C (en:Method) | 1929-11-14 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE367704A (en:Method) |
| CH (1) | CH145794A (en:Method) |
| DE (1) | DE581835C (en:Method) |
| FR (1) | FR688476A (en:Method) |
| GB (1) | GB344633A (en:Method) |
| NL (1) | NL29441C (en:Method) |
-
0
- BE BE367704D patent/BE367704A/xx unknown
- NL NL29441D patent/NL29441C/xx active
-
1929
- 1929-11-14 DE DET40511D patent/DE581835C/de not_active Expired
-
1930
- 1930-01-20 FR FR688476D patent/FR688476A/fr not_active Expired
- 1930-02-06 CH CH145794D patent/CH145794A/de unknown
- 1930-02-17 GB GB533730A patent/GB344633A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB344633A (en) | 1931-03-12 |
| BE367704A (en:Method) | |
| FR688476A (fr) | 1930-08-23 |
| DE581835C (de) | 1933-08-03 |
| CH145794A (de) | 1931-03-15 |