US Patent: 1,468,529


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Wrench

Patentee:

William O. Vivarttas (exact or similar names) - 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

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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.