Splittable typist keyboard

Details Splittable typist keyboard Splittable typist keyboard

1988-08-24

1991-01-29

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

D14100, D18 12

Patent

active

D03142051

REFERENCES:
patent: D219589 (1970-12-01), Miller
patent: D280411 (1985-09-01), Sakamoto
patent: D282069 (1986-01-01), Lindhe
patent: D285793 (1986-09-01), Moggridge
patent: D287249 (1986-12-01), Lindhe
patent: 3825101 (1974-07-01), Wineman
patent: 3830352 (1974-08-01), Kolpek
patent: 3990565 (1976-11-01), Felton et al.
patent: 4564751 (1986-01-01), Alley et al.
patent: 4661005 (1987-04-01), Lahr
patent: 4684275 (1987-08-01), Matsushita et al.

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