Printing and office machinery – Typewriter or calculator – Calculator
Patent
1977-09-06
1979-03-06
Lucas, Susan J.
Printing and office machinery
Typewriter or calculator
Calculator
D1801
Patent
active
D02512718
REFERENCES:
patent: D229065 (1973-11-01), Maeda et al.
patent: D238951 (1976-02-01), Herr et al.
patent: 3996428 (1976-12-01), Buan et al.
Office Products, Apr., 1974, p. 62, Mod. BC-0808B, Electronic Calculator.
Office Products, May, 1975, p. 70, Eight-Digit Pocket Calculator.
Flehr Paul D.
Lucas Susan J.
Sharp Corporation
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