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US Patent: D108,159
Wrench or the Like
Patentee:
Sigmund Mandl - Milwaukee, WI

USPTO Classifications:
D8/25

Tool Categories:
wrenches : wrench components : wrench handle components
wrenches : socket wrenches

Assignees:
Blackhawk Mfg. Co. - Milwaukee, WI

Manufacturer:
Blackhawk Mfg. Co. - Milwaukee, WI

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 27, 1937
Granted: Jan. 25, 1938

Patent Pictures:
Sigmund Mandl design patent Jan. 25, 1938
USPTO pdf tiff
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Description:
Design for the grip portion of a handle for "breaker bar" or ratchet driver for socket set.

The design was called "GRIPLINE" in company literature, and appears on wrench handles beginning in the late 1930s .

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