Combination ruler and calculator

Details Combination ruler and calculator Combination ruler and calculator

1996-08-08

1997-09-30

Veynar, Caron D.

Printing and office machinery

Typewriter or calculator

Combined

D10 71, 1801

Patent

active

D03843661

REFERENCES:
patent: D271025 (1983-10-01), Li
patent: D279381 (1985-06-01), Leung
patent: D283515 (1986-04-01), Li
patent: D286161 (1986-10-01), Wong
patent: D289414 (1987-04-01), Peters et al.

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