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US Patent: 410,240
Henry Hammond - New Haven, CT

USPTO Classifications:
76/114, 81/171

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


Henry Hammond - New Haven, CT

William S. Bellows
H. A. Chaplin
G. M. Chamberlain

Patent Dates:
Applied: Nov. 22, 1888
Granted: Sep. 03, 1889

Reissue Information:
Reissued as RE11,277 (Oct. 18, 1892)

Patent Pictures: [ 1 | 2 ]
Henry Hammond patent September 3, 1889
USPTO pdf tiff
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Hammond produced this wrench as a full-size monkey wrench with nickel plated metal sides and wood handle before selling the patent to J.H. Williams and Co.

A known 8 inch example is marked H. Hammond Pat 9-3-1889. After the patent was re-issued (RE11,277) and assigned to J.H. Williams & Co, they produced the wrench as an all-metal pocket wrench.

H. A. Chaplin - patent attorney

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