Compact ergonomic telephony keypad

Details Compact ergonomic telephony keypad Compact ergonomic telephony keypad

2005-09-27

2005-09-27

Nguyen, Anthony H. (Department: 2854)

Typewriting machines

Key-board or key lever-actuating mechanism

Key-board having multiple-character, multiple-movement keys

C400S472000

Reexamination Certificate

active

06948869

ABSTRACT:
A compact, ergonomic telephony keypad is described which comprises three principle buttons capable of performing twelve distinct electronic switch operations. The three principle buttons are positioned in a group comprising a telephony keypad with each button formed for tactile manipulation to achieve four of the twelve switch operations. Each button also has four tactile depressible areas positioned thereon around an imaginary central axis. The four tactile depressible areas are spaced about equally apart around the imaginary central axis of each of the principle buttons. And, the three principle buttons are spaced apart and positioned relative to each other so as to substantially maximize the spacing of the twelve depressible areas, while, substantially minimizing the spacing of the principle buttons.

REFERENCES:
patent: 5359658 (1994-10-01), Goodson
patent: 5861823 (1999-01-01), Strauch et al.
patent: 6144732 (2000-11-01), Jauregui et al.
patent: 6377685 (2002-04-01), Krishnan
patent: 2003/0121964 (2003-07-01), Crisan
patent: 2003/0161672 (2003-08-01), Roberson
patent: 2003/0235452 (2003-12-01), Kraus et al.

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