Machines not elsewhere specified – Material working – abrading – or founding machinery – Element or attachment
Patent
1991-04-15
1993-10-19
Douglas, Alan P.
Machines not elsewhere specified
Material working, abrading, or founding machinery
Element or attachment
Patent
active
D03404650
REFERENCES:
patent: D245668 (1977-09-01), Bretthauer
patent: D272711 (1984-02-01), Griset
patent: 1013010 (1911-12-01), Graham
patent: 4521006 (1985-06-01), Waters
patent: 4712462 (1987-12-01), Cvek
patent: 4717058 (1988-01-01), Gobert
patent: 5136909 (1992-08-01), Mellick
Davis Antoine D.
Douglas Alan P.
Gilden Leon
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