4-way triangular-shaped alphanumeric keyboard

Details 4-way triangular-shaped alphanumeric keyboard 4-way triangular-shaped alphanumeric keyboard

1995-01-04

1998-12-22

Hofsass, Jeffery

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 20, 341 22, 200 5A, 200 6A, 36470915, H03K 1794

Patent

active

058524142

ABSTRACT:
A triangle shape 4-way switching button for entering alphanumeric data on a 10-key pad. Each key may be used to input four characters by pressing the center of the key or one of the three corners. Each stroke enters one character, alphabet or number. Thus, an ultraminiature hand-held computer or device can be developed or manufactured.

REFERENCES:
patent: 3705424 (1972-12-01), Harvey, Jr.
patent: 3879618 (1975-04-01), Larson
patent: 4159471 (1979-06-01), Whitaker
patent: 4256931 (1981-03-01), Palisek
patent: 4554426 (1985-11-01), Caste
patent: 4891777 (1990-01-01), Lapeyre
patent: 5124514 (1992-06-01), Chen
patent: 5184490 (1993-02-01), Takahashi
patent: 5199556 (1993-04-01), Lee

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