Electronic calculator with solar cell

Details Electronic calculator with solar cell Electronic calculator with solar cell

1999-11-10

2000-10-31

Veynar, Caron D.

Printing and office machinery

Typewriter or calculator

Calculator

1801

Patent

active

D04330587

REFERENCES:
patent: D279565 (1985-07-01), Forbis et al.
patent: D303681 (1989-09-01), Sakaguchi et al.
patent: D317458 (1991-06-01), Sawada et al.
patent: D322088 (1991-12-01), Sawada et al.

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