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US Patent: 1,468,529
Wrench
Patentee:
William O. Vivarttas - Weehawken, NJ

USPTO Classifications:
81/99

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
None

Manufacturer:
Efficiency Device Corporation - New York, NY

Witnesses:
M. E. Lessin

Patent Dates:
Applied: Jun. 04, 1921
Granted: Sep. 18, 1923

Patent Pictures: [ 1 | 2 ]
William O. Vivarttas patent September 18, 1923
USPTO pdf tiff
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Description:
The patent refines Vivarttas' Aug. 20, 1918 patent (no. 1,276,596), and matches the self-adjusting STIX-ON WRENCH .. PAT. AUG. 20, '18 OTHER PATS. PENDING.

The patent describes the manufacturing process for assembling the wrench from stamped parts.

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