Printing and office machinery – Typewriter or calculator – Calculator
Patent
1977-05-18
1979-05-15
Lucas, Susan J.
Printing and office machinery
Typewriter or calculator
Calculator
D14 43, D1801, D1402
Patent
active
D02518724
REFERENCES:
patent: D225533 (1972-12-01), Bellini
patent: D227257 (1973-06-01), Clary et al.
Hewlett Packard Brochure, Jul. 1976, Programmable Printing Calculator Model HP-97.
Martell Harrison J.
Schultz Loren A.
Lucas Susan J.
Zinn Robert J.
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