Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1992-07-01
1995-02-14
Douglas, Alan P.
Printing and office machinery
Typewriter or calculator
Element or attachment
Patent
active
D03554350
REFERENCES:
patent: D62192 (1923-04-01), Helfrecht
patent: D208736 (1967-09-01), Van Acker
patent: D217303 (1970-04-01), Ainslie et al.
patent: D229427 (1973-11-01), Hunt et al.
patent: 3935939 (1976-02-01), Schmidt et al.
Shimoyama Noboru
Yoshida Keita
Canon Business Machines, Inc.
Douglas Alan P.
Veynar Caron D.
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