Electronic calculator multi-function programmable

Details Electronic calculator multi-function programmable Electronic calculator multi-function programmable

1990-05-30

1992-07-21

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Combined

D14100, D18 7

Patent

active

D03280896

REFERENCES:
patent: D285805 (1986-09-01), Yubisui et al.
patent: D293688 (1988-01-01), Yubisui et al.
patent: D299464 (1989-01-01), Shiozawa et al.
patent: D304930 (1989-12-01), Hongo et al.
patent: D317781 (1991-06-01), Takahata
patent: D317935 (1991-07-01), Sawano

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