Machines not elsewhere specified – Material working – abrading – or founding machinery – Element or attachment
Patent
1976-10-13
1978-07-04
Douglas, Alan P.
Machines not elsewhere specified
Material working, abrading, or founding machinery
Element or attachment
D1509
Patent
active
D02483980
REFERENCES:
patent: D174094 (1955-02-01), Meyer
patent: D189218 (1960-11-01), Mitzelfeld et al.
patent: 2390865 (1945-12-01), Bemis
patent: 2969231 (1961-01-01), Mills
Douglas Alan P.
Kalish Ralph W.
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