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US Patent: 473,087
Plane Iron
Cutting Iron with Circular Opening and Slot.
Patentee:
Edmund A. Schade - New Britain, CT

USPTO Classifications:
30/493

Tool Categories:
woodworking tools : planes : plane blades
woodworking tools : planes : plane cap irons

Assignees:
The Stanley Rule & Level Co. - New Britain, CT

Manufacturer:
The Stanley Rule & Level Co. - New Britain, CT

Witnesses:
S. Walter F. N. Stanley

Patent Dates:
Applied: Jan. 08, 1891
Granted: Apr. 19, 1892

Patent Pictures:
USPTO pdf tiff
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Description:
Schade claimed "the combination of a plane-iron having a longitudinal slot with the cutter enlargement at its lower end, said slot extending up near to the upper end of the bit without any enlargement at said upper end, and a laterally-adjusting lever having a projecting part fitted to work in the upper end of said slot, substantially as described, and for the purpose specified." Stanley and Ohio Tool litigated this over Ohio Tool's hex-shaped irons.

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