Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1981-11-24
1984-01-03
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Element or attachment
D19 91, D1899
Patent
active
D02720752
REFERENCES:
patent: 368962 (1887-08-01), Munro et al.
patent: 3900098 (1975-08-01), Effinger
IBM Technical Disclosure Bulletin, vol. 22, No. 8B, 1/1980, p. 3587-Removable Document Entry Tray.
The Office, 2/1980, p. 20-Paper Entry Guide at center photo.
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