Printing and office machinery – Typewriter or calculator – Calculator
Patent
1996-09-20
1998-11-24
Veynar, Caron D.
Printing and office machinery
Typewriter or calculator
Calculator
1801
Patent
active
D04016130
REFERENCES:
patent: 1405847 (1922-02-01), Johnson
patent: 2702669 (1955-02-01), Hollowell
patent: 4048477 (1977-09-01), Hungerford
patent: 4329570 (1982-05-01), Koll
patent: 4568822 (1986-02-01), Retzko
patent: 4918412 (1990-04-01), Churchill
Crozier John H.
Veynar Caron D.
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