Printing and office machinery – Typewriter or calculator – Calculator
Patent
1993-08-05
1995-09-05
Douglas, Alan P.
Printing and office machinery
Typewriter or calculator
Calculator
D18 2
Patent
active
D03620131
REFERENCES:
patent: D263466 (1982-03-01), Hiraki
patent: D284966 (1986-08-01), Larkins
patent: D291201 (1987-08-01), Weisel, Sr. et al.
patent: 4142236 (1979-02-01), Martz et al.
patent: 4882472 (1989-11-01), Sigman
Douglas Alan P.
Gernstein Terry M.
Veynar Caron D.
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