Keyboard with bisectional letter keys

Details Keyboard with bisectional letter keys Keyboard with bisectional letter keys

1991-04-08

1993-06-01

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03360830

REFERENCES:
patent: D293911 (1988-01-01), Lynar et al.
patent: D311384 (1990-10-01), Lazere et al.
patent: D313402 (1991-01-01), Esslinger
patent: D316405 (1991-04-01), Yoshitake
patent: D319047 (1991-08-01), Yomo
patent: D330199 (1992-10-01), Mendel et al.

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