Telephone dialer
US4277651A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1978 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Sep 13, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/27495
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides both repertory and abbreviated dialing functions in a telephone dialer that facilitates telephone dialing operation. In particular, by pressing an enablng key the system is enabled for automatic dialing operation to dial a desired telephone number upon selection of a single repertory key or, for example, two keys from the key pad, which establishes coded information that effects automatic dialing operation of the desired telephone number. According to a preferred embodiment of the invention electrical circuitry for the telephone dialer is controlled by a microprocessor, or the like, which includes a central processor unit (CPU). On-hook dialing, telephone and/or speaker muting during dialing and unmuting while waiting for access to a line, security of stored telephone information and dialer use, and adaptability of the dialer to different telephone equipment having different dialing pulse formats may be included in the telephone dialer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.