Invention Grant
- Patent Title: Alphabetic telephone dialer apparatus and method
- Patent Title (中): 字母电话拨号设备及方法
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Application No.: US173349Application Date: 1993-12-23
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Publication No.: US5388154APublication Date: 1995-02-07
- Inventor: William Solomon
- Applicant: William Solomon
- Assignee: Solomon; William
- Current Assignee: Solomon; William
- Main IPC: H04M1/26
- IPC: H04M1/26 ; H04M11/06 ; H04M11/00
Abstract:
A telephone dialing method relating each key of an alphabetic keyboard to a numeric digit and a telephone dialing apparatus and alphabetic keyboard device for sending dual-tone-multi-frequency (DTMF) and/or pulse telephone dialing signals over a communication path such as a local loop connecting a subscriber telephone to a switching office via a telephone dialing circuit. The alphabetic keyboard device may be configured according to a conventional typewriter QWERTY keyboard layout and is connectable to a conventional telephone to supplement its 12-key standard keypad, allowing the telephone to be dialed with individual alphabetic letters.
Public/Granted literature
- US4835224A Process for the preparation of polyamines and their use for the production of polyurethanes Public/Granted day:1989-05-30
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