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US Patent: 2,216,878
Method of Forming Detents
Leroy F. Densmore - Kenosha, WI

USPTO Classifications:
29/441.1, 29/446

Tool Categories:
wrenches : socket wrenches

Snap-On Tools, Inc. - Kenosha, WI

Not known to have been produced

none listed

Patent Dates:
Applied: Apr. 04, 1938
Granted: Oct. 08, 1940

Patent Pictures:
Leroy F. Densmore patent October 8, 1940
USPTO pdf tiff
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Snap-On Tools Company History
Since this is a process patent, examination of the manufactured pieces could show if this process was used to form spring / ball detents.

Harry C. Alberts - patent attorney

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