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US Patent: 784,200
Wrench Attachment
Patentee:
Joseph C. Zumwalt (exact or similar names) - Clay Center, NE

USPTO Classifications:
81/183

Tool Categories:
wrenches : wrench components : pipe jaw attachments for wrenches

Assignees:
Joseph C. Zumwalt - Clay Center, NE
Gilbert E. Stone - Harvard, NE
Bertrum Greggs - Clay Center, NE

Manufacturer:
Not known to have been produced

Witnesses:
C. Munter
L. O. Hilton
L. F. Fryar
John Schwindt

Patent Dates:
Applied: Jul. 14, 1904
Granted: Mar. 07, 1905

Patent Pictures:
Joseph C. Zumwalt patent March 7, 1905
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Description:
Pipe grip attachment for nut wrench comprised of a roller with gripping surface and indentations on the ends, along with a spring clip. The combination could also be used as a key ring.

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