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US Patent: 616,579
Double Grip Sliding Jaw Wrench
Patentee:
John Jacob Adolf Miller (exact or similar names) - Denver, CO

USPTO Classifications:
81/147

Tool Categories:
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Claude A. Dunn
Bessie Thompson
Patent Dates:
Applied: Aug. 06, 1898
Granted: Dec. 27, 1898

Patent Pictures:
John Jacob Adolf Miller patent December 27, 1898
USPTO (New site tip)
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Description:
A spring-loaded catch on the movable jaw holds the adjustment.

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