Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1991-03-29
1994-03-01
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Element or attachment
D18 58
Patent
active
D03447480
REFERENCES:
patent: 3831731 (1974-10-01), Mack
patent: 4636097 (1987-01-01), Goubeaux
patent: 4948275 (1990-08-01), Kuhn
patent: 5005997 (1991-04-01), Chung
patent: 5048986 (1991-09-01), Czesnik
Emura Keiichi
Oka Shigeo
Wada Hiroshi
Adams Bruce I.
Holtje Nelson C.
Pentel Kabushiki Kaisha
Spear Robert M.
Wilks Van C.
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