Office supplies; artists and teachers materials – Teaching material
Patent
1988-09-28
1991-10-22
Burke, Wallace R.
Office supplies; artists and teachers materials
Teaching material
Patent
active
D03210103
REFERENCES:
patent: D247441 (1978-03-01), Kroll
patent: 641739 (1900-01-01), Thompson
patent: 1396379 (1921-10-01), Moore
patent: 1732980 (1929-10-01), Mooney
patent: 2782038 (1957-02-01), Engel, Jr.
patent: 4030211 (1977-06-01), McGinley
patent: 4824376 (1989-04-01), Arash
Burke Wallace R.
Schmidt Pamela
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