CH607492A5 - - Google Patents
Info
- Publication number
- CH607492A5 CH607492A5 CH641875A CH641875A CH607492A5 CH 607492 A5 CH607492 A5 CH 607492A5 CH 641875 A CH641875 A CH 641875A CH 641875 A CH641875 A CH 641875A CH 607492 A5 CH607492 A5 CH 607492A5
- Authority
- CH
- Switzerland
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)
- Meter Arrangements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7418095A FR2272552B1 (de) | 1974-05-24 | 1974-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH607492A5 true CH607492A5 (de) | 1978-12-29 |
Family
ID=9139229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH641875A CH607492A5 (de) | 1974-05-24 | 1975-05-20 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3997726A (de) |
| JP (1) | JPS512306A (de) |
| AR (1) | AR205379A1 (de) |
| BE (1) | BE829443A (de) |
| CH (1) | CH607492A5 (de) |
| DE (1) | DE2521902C3 (de) |
| DK (1) | DK228675A (de) |
| ES (1) | ES437853A1 (de) |
| FR (1) | FR2272552B1 (de) |
| GB (1) | GB1464058A (de) |
| IT (1) | IT1035801B (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4105867A (en) * | 1977-02-07 | 1978-08-08 | H. R. Electronics Company | Control circuit for pay telephones and the like |
| US4198545A (en) * | 1978-03-08 | 1980-04-15 | Communication Equipment And Engineering Company | Automatic call timing telephone apparatus |
| JPS5970412A (ja) * | 1982-10-15 | 1984-04-20 | Sumitomo Metal Ind Ltd | ロ−ル組替方法 |
| US4674114A (en) * | 1983-12-30 | 1987-06-16 | At&T Technologies Inc. And At&T Bell Laboratories | Fraud prevention in an electronic coin telephone set |
| US4777647A (en) * | 1986-09-29 | 1988-10-11 | Digital Telecommunications Systems, Inc. | Pay station telephone interface |
| US6370242B1 (en) * | 2000-01-24 | 2002-04-09 | Mars Incorporated | Payphone electronic coin validator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA736048A (en) * | 1966-06-07 | Houldsworth Jack | Payment control apparatus | |
| US3221101A (en) * | 1961-02-20 | 1965-11-30 | Comm Equipment & Engr Co | Telephone systems and the like |
| NL133410C (de) * | 1963-03-19 | |||
| US3579253A (en) * | 1968-11-08 | 1971-05-18 | Bell Telephone Labor Inc | Coin telephone circuit for dial-tone-first service |
| US3814907A (en) * | 1970-12-28 | 1974-06-04 | Bell Telephone Labor Inc | Coin operated telephone set employing electronic totalizer |
| US3881062A (en) * | 1973-10-26 | 1975-04-29 | Gte Automatic Electric Lab Inc | Totalizer circuit for coin operated telephones |
-
1974
- 1974-05-24 FR FR7418095A patent/FR2272552B1/fr not_active Expired
-
1975
- 1975-01-01 AR AR258928A patent/AR205379A1/es active
- 1975-05-16 DE DE2521902A patent/DE2521902C3/de not_active Expired
- 1975-05-19 US US05/578,748 patent/US3997726A/en not_active Expired - Lifetime
- 1975-05-20 CH CH641875A patent/CH607492A5/xx not_active IP Right Cessation
- 1975-05-20 IT IT49693/75A patent/IT1035801B/it active
- 1975-05-21 GB GB2184875A patent/GB1464058A/en not_active Expired
- 1975-05-22 ES ES437853A patent/ES437853A1/es not_active Expired
- 1975-05-23 BE BE156671A patent/BE829443A/xx unknown
- 1975-05-23 JP JP50061800A patent/JPS512306A/ja active Pending
- 1975-05-23 DK DK228675A patent/DK228675A/da unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2521902B2 (de) | 1978-03-30 |
| DK228675A (da) | 1975-11-25 |
| FR2272552B1 (de) | 1976-10-15 |
| BE829443A (fr) | 1975-09-15 |
| DE2521902C3 (de) | 1978-11-16 |
| FR2272552A1 (de) | 1975-12-19 |
| DE2521902A1 (de) | 1975-12-04 |
| IT1035801B (it) | 1979-10-20 |
| US3997726A (en) | 1976-12-14 |
| ES437853A1 (es) | 1977-01-01 |
| JPS512306A (en) | 1976-01-09 |
| GB1464058A (en) | 1977-02-09 |
| AR205379A1 (es) | 1976-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |