Machines not elsewhere specified – Heat treatment – welding or brazing – Scientific – laboratory – or industrial heating equipment
Patent
1991-08-09
1993-10-19
Douglas, Alan P.
Machines not elsewhere specified
Heat treatment, welding or brazing
Scientific, laboratory, or industrial heating equipment
Patent
active
D03404668
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Davis Antoine D.
Douglas Alan P.
Kinney Richard G.
Simko & Sons Industrial Refractories Inc.
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