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US Patent: 645,665
Henry B. Hartford - Standish, ME

USPTO Classifications:
81/175, 81/177.1, 81/186

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Orlando P. Weeks - Standish, ME
Bion W. Whitney - Standish, ME

Weeks and Whitney Wrench Co. - Sebago Lake, ME

Chas. E. Brock
W. C. Lunsford
Alvin C. Dresser
Bion W. Whitney

Patent Dates:
Applied: Jul. 22, 1899
Granted: Mar. 20, 1900

Patent Pictures:
Henry B. Hartford patent March 20, 1900
USPTO pdf tiff
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Toothed curved jaws and screw clamping action for gripping and turning pipes and rods.

The patent has been associated with the WEEKS & WHITNEY (Sebago Lake, ME) wrench introduced in 1913. That wrench has straight jaw faces with sharp tips for grasping the round heads of carriage bolts.

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