Information transmission/reception system using pushphone and information reception apparatus
US4658417A · kind A · utility
40Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1984 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Oct 4, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/906
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Letters and a space are assigned to numeric keys of a pushphone. A desired numeral, letter or space is transmitted by depressing a corresponding numeric key a predetermined number of times, and thereafter a specific symbol key is depressed. At a reception side, a transmitted letter is detected in accordance with the corresponding numeric key code and the data representing the number of times of depression of the corresponding numeric key. An alphanumeric character string is thus displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.