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US Patent: 555,931
Chain Pipe Wrench
Patentee:
George F. Crass (exact or similar names) - Ithaca, NY

USPTO Classifications:
81/65.2, 81/70

Tool Categories:
wrenches : pipe wrenches : chain and strap wrenches

Assignees:
George F. Crass - Ithaca, NY
Benjamion F. Slocum - Ithaca, NY

Manufacturer:
Not known to have been produced

Witnesses:
Reeve Lewis
W. Rees Edelsen
W. T. Wright
Otis E. Wood

Patent Dates:
Applied: Aug. 02, 1895
Granted: Mar. 10, 1896

Patent Pictures:
George F. Crass patent March 10, 1896
USPTO (New site tip)
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Description:
Specialized chain -- the links close to the point of attachment have "gripping" surfaces; the links further out are shaped to fit the hooks on the shank.

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