Multipurpose calculator case

Details Multipurpose calculator case Multipurpose calculator case

1989-10-10

1991-09-03

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

D18 11, D19 76

Patent

active

D03196518

REFERENCES:
patent: D249952 (1978-10-01), Yuen
patent: D260534 (1981-09-01), Halm
patent: D302007 (1989-07-01), Hara et al.
patent: D310543 (1990-09-01), Brown
patent: D312831 (1990-12-01), Sawada et al.
patent: 4644391 (1987-02-01), Shibuya et al.

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