Machines not elsewhere specified – Material working – abrading – or founding machinery – Cutting
Patent
1976-05-10
1977-07-26
Douglas, Alan P.
Machines not elsewhere specified
Material working, abrading, or founding machinery
Cutting
D1509
Patent
active
D02451646
REFERENCES:
patent: D233911 (1974-12-01), Marsh et al.
patent: 3387525 (1968-06-01), Funke
Persik Gerald E.
Persik James E.
Douglas Alan P.
J. J. & M.
Kryshak Thad F.
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