Machines not elsewhere specified – Material working – abrading – or founding machinery – Element or attachment
Patent
1991-09-12
1993-08-10
Douglas, Alan P.
Machines not elsewhere specified
Material working, abrading, or founding machinery
Element or attachment
Patent
active
D03382133
REFERENCES:
patent: D246524 (1977-11-01), Lauber
patent: D263598 (1982-03-01), Lassiter
patent: 2113178 (1938-04-01), Gase
patent: 2782489 (1957-02-01), Hargrove et al.
patent: 2861323 (1958-11-01), Ebel
patent: 3491422 (1970-01-01), Kelly et al.
patent: 4219292 (1980-08-01), Hoffmann et al.
Davis A. D.
Douglas Alan P.
Richardson Robert O.
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