Printing and office machinery – Typewriter or calculator – Calculator
Patent
1991-08-30
1994-01-18
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Calculator
D18 12
Patent
active
D03434079
REFERENCES:
patent: D279107 (1985-06-01), Kikuchi et al.
patent: D291694 (1987-09-01), Aihara
patent: D296553 (1988-07-01), Takahashi
patent: D296697 (1988-07-01), Takahashi et al.
patent: D308860 (1990-06-01), Tsukada et al.
patent: D311907 (1990-11-01), Yoshihara
patent: D324673 (1992-03-01), Iino
patent: D330016 (1992-10-01), Mizusugi et al.
Canon Kabushiki Kaisha
Holtje Nelson C.
Spear Robert M.
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