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US Patent: 41,894
Improvement in Countersinks
Patentee:
H. S. Shepardson - Shelburne Falls, MA

USPTO Classifications:
408/191

Tool Categories:
woodworking tools : hand drills : drill bits : countersinks

Assignees:
H. S. Shepardson - Shelburne Falls, MA
F. R. Pratt - Shelburne Falls, MA
W. H. Maynard - Shelburne Falls, MA

Manufacturer:
Not known to have been produced

Witnesses:
H. A. Merritt
John V. Griebel

Patent Dates:
Granted: Mar. 08, 1864

Patent Pictures:
USPTO pdf tiff
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