Telephone dialling system
US4535204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1982 |
| Grant date | Aug 13, 1985 |
| Priority date | — |
| Expiry date | Jul 16, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/91
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone dialling system uses a hand-held wand to read telephone numbers represented in bar-code form. The coded numbers are converted to electrical signals, stored and then dialed out in impulse or tone signalling form. A microprocessor implementation and its routines are described. The coded representation may be a 2-out-of-5 code or preferably a hexadecimal code provided by four bars. The hexadecimal allows the provision of characters in addition to numerals 0-9 and enables instructions and other control functions to be entered into and acted upon by the microprocessor. The telephone numbers can be provided on documents such as letterheads or directories. The instruction and control facilities can be generated from labels formed on a pad and containing the hexadecimal codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.