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US Patent: 452,907
Wrench
Patentees:
Enoch Ohnstrano (exact or similar names) - Jamestown, NY
Oscar Gustafson (exact or similar names) - Jamestown, NY

USPTO Classifications:
81/139, 81/145

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. S. Duvall
E. M. Gallaher
James L. Weeks
Jno. I. Fowler

Patent Dates:
Applied: Jan. 07, 1891
Granted: May 26, 1891

Patent Pictures:
Enoch Ohnstrano and Oscar Gustafson patent May 26, 1891
USPTO (New site tip)
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Description:
Rack teeth on the shank, a toothed pawl in the movable jaw, and a thumb lever to operate the toothed pawl.

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