Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1988-03-23
1991-07-30
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Element or attachment
D18 22
Patent
active
D03186822
REFERENCES:
patent: 4269520 (1981-05-01), Gabler
patent: 4279522 (1981-07-01), Yonkers
patent: 4801215 (1989-01-01), Paffhausen et al.
Adams Bruce L.
Holtje Nelson C.
Seikosha Co. Ltd.
Veynar Caron D.
Wilks Van C.
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