Keyboard divided by central inverted T-shaped entry-space key

Details Keyboard divided by central inverted T-shaped entry-space key Keyboard divided by central inverted T-shaped entry-space key

1990-12-06

1992-10-20

Eickholt, Eugene H.

Typewriting machines

Key-board or key lever-actuating mechanism

400489, 400490, 235145R, B41J 508

Patent

active

051564750

ABSTRACT:
A keyboard comprises a plurality of regular keys, and an inverted T-shaped key subdividing the regular keys into two sections including one section for preferably left-hand operation and another section preferably for right-hand operation. A keyboard further comprises a trackball and/or two rollers requiring minimal hand movement in using them for mouse emulation.

REFERENCES:
patent: 4244659 (1981-01-01), Malt
patent: 4564751 (1986-01-01), Alley et al.
patent: 4579470 (1986-04-01), Casey
patent: 4661005 (1987-04-01), Lahr

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