Office supplies; artists and teachers materials – Book – album or cover – Ring bound or looseleaf type
Patent
1989-06-14
1991-06-11
Burke, Wallace R.
Office supplies; artists and teachers materials
Book, album or cover
Ring bound or looseleaf type
D19 26
Patent
active
D03174620
REFERENCES:
patent: 2390125 (1945-12-01), Schade
patent: 2790651 (1957-04-01), Winstead
patent: 3190678 (1965-06-01), Peterson et al.
patent: 3201145 (1965-08-01), Libby
patent: 3325917 (1967-06-01), Kinnaman
Matsumoto Kuniyasu
Sawada Masaji
Burke Wallace R.
Schmidt P.
Sharp Corporation
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