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US Patent: 1,283,740
Drill
Patentee:
Clarence B. Groff - Camden, NJ

USPTO Classifications:
408/226, 408/227

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
P. F. Nagel
L. Dowville
H. S. Fairbanks
C. D. McVay

Patent Dates:
Applied: Apr. 04, 1910
Granted: Nov. 05, 1918

Patent Pictures:
USPTO pdf tiff
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Description:
Wiedershein & Fairbanks - patent attorneys

Appliication renewed 27 Dec. 1917.

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