Printing and office machinery – Typewriter or calculator – Calculator
Patent
1991-02-22
1992-11-24
Vales-Lado, Carmen H.
Printing and office machinery
Typewriter or calculator
Calculator
Patent
active
D03312542
REFERENCES:
patent: D249091 (1978-08-01), Bartis
patent: D258966 (1981-04-01), McCrae
patent: D276536 (1984-11-01), Siefert
Hong Kong Enterprise, May 1986, p. 14, Round Simulative Calculators.
Hong Kong Enterprise, Oct. 1989, p. 256, round currency calculator-top left of page.
Hiromori Inc.
Hunt Ann
Vales-Lado Carmen H.
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