Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1989-10-05
1991-04-30
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Element or attachment
Patent
active
D03165612
REFERENCES:
patent: 4279522 (1981-07-01), Yonkers
patent: 4293234 (1981-10-01), Yonkers et al.
patent: 4343556 (1982-08-01), Kobayashi
Blum Kaplan
Holtje Nelson C.
Seiko Epson Corporation
Veynar Caron D.
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