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US Patent: 159,652
Improvement in Tempering Steel Plates
Patentees:
Henry Disston - Philadelphia, PA
Charles T. Shoemaker - Philadelphia, PA

USPTO Classifications:
432/122

Tool Categories:
tool making : making sawblades
tool making : making handsaws

Assignees:
Henry Disston - Philadelphia, PA
Hamilton Disston - Philadelphia, PA
Albert H. Disston - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
William H. Wright
A. H. Shoemaker

Patent Dates:
Granted: Feb. 09, 1875

Patent Pictures:
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Description:
Patent to rapidly harden or temper saw blades and other steel objects buy having them traverse down an inclined furnace flue.

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