Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1988-12-21
1991-12-10
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Element or attachment
Patent
active
D03222721
REFERENCES:
patent: 3854565 (1974-12-01), Kupferschmidt et al.
patent: 4406553 (1983-09-01), Nally et al.
patent: 4601594 (1986-07-01), Hayashi et al.
IBM Technical Disclosure Bulletin, vol. 25, No. 12, May 1983.
B. A. Pargh Catalog: Sep. 1985; #12996421BM, Quietwriter Printer Non Correcting Ribbon, lower right.
Holtje Nelson C.
Ing. C. Olivetti & C. S.p.A.
Veynar Caron D.
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