Printing and office machinery – Typewriter or calculator – Calculator
Patent
1989-02-24
1991-12-17
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Calculator
D18 7
Patent
active
D03224503
REFERENCES:
patent: D247684 (1978-04-01), Tiffany
patent: 4142236 (1979-02-01), Martz et al.
patent: 4331425 (1982-05-01), Davis, Jr.
patent: 4367526 (1983-01-01), McGeary et al.
patent: 4369973 (1983-01-01), D'Aurora et al.
patent: 4745875 (1988-05-01), Timleck
Royal Golf Catalogue, p. 15, #L (the Scorecard).
Holtje Nelson C.
Veynar Caron D.
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