Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1978-10-10
1979-10-30
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Element or attachment
D1801
Patent
active
D02533120
REFERENCES:
patent: D245116 (1977-07-01), Trezise
patent: D247033 (1978-01-01), Muramatsu et al.
patent: 3008661 (1961-11-01), Estes et al.
patent: 3354776 (1967-11-01), Smitzer et al.
patent: 4013160 (1977-03-01), Colecchi
Lenney Edwin J.
Schaefer John O.
Dick William J.
International Business Machines - Corporation
Zarfas Louis S,.
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