Case for electronic calculator

Details Case for electronic calculator Case for electronic calculator

1987-07-07

1990-07-31

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03096289

REFERENCES:
patent: D243250 (1977-02-01), Hazama
patent: D250063 (1978-10-01), Nishino et al.
patent: D279688 (1985-07-01), Kitai et al.
patent: D298545 (1988-11-01), Yoshioka et al.
patent: 4157588 (1979-06-01), Ebihara et al.

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