Modular public telephone for outside use
US4974257A · kind A · utility
31Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Aug 9, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M17/026
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modular public telephone has two independent armored boxes, one of which contains the telephone mechanism and the other of which is a strong coin receiving box. Both boxes are provided with front doors, and the upper box has a number of windows for receiving the respective operating modules including a coin insertion module a credit card insertion module, a display module, a keyboard module, a coin return module and a handset receiving module. A number of the modules can be interchanged or substituted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.