If you find a patent number or patent date by this manufacturer that is not on this
list, please contact the Site Historian.
Key to Links for Patent Information
USPTO = U.S. Patent Office .
Images of the actual patent can be viewed on the U.S. Patent Office web site but
a special TIFF viewer must be installed with your browser in order properly work.
More information on how to configure your computer to view these patents can be
found at TIFF image Viewers
for Patent Images.
DATAMP = Directory of American Tool And
Machinery Patents . A sister site to VintageMachinery.org with information
on patents related to machinery and tools. A much easier user interface than the
USPTO's for finding information on machinery patents.
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486,235
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Nov. 15, 1892
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Pipe-Wrench
|
Alfred N. Parnall |
Erie, PA |
A swinging hook jaw combined with a pair of "v" shaped alligator-jaw bearing surfaces on the handle form a self-adjusting pipe wrench with three gripping points of contact.
Produced as the "Eagle" pipe wrench. |
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597,681
|
Jan. 18, 1898
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Vise
|
Mortimer G. Lewis |
New York, NY |
Seen on eBay: a vise closely resembling the patent drawing and bearing the name "Hollands Mfg. Co." |
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600,830
|
Mar. 15, 1898
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Pipe-vise
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Robert B. Hough |
Erie, PA |
|
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D29,338
|
Sep. 13, 1898
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Design For A Wrench-Jaw
|
Robert Hough |
Erie, PA |
This pipe wrench jaw has a shank with a webbed center, and unequal width ribs at the top and bottom which have arc segments of the adjusting threads.
The design is not known to have been used. |
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664,361
|
Dec. 18, 1900
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Pipe-vise
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Henry F. Renner |
Erie, PA |
|
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680,439
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Aug. 13, 1901
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Bench-vise
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Henry F. Renner |
Erie, PA |
|
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700,087
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May. 13, 1902
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Pipe Wrench
|
Henry F. Renner |
Erie, PA |
A large adjusting sleeve with internal teeth engages teeth on the shank of the movable jaw. The wrench is comprised of only three pieces. The bearing surface between the movable jaw and handle is slightly convex and the adjusting sleeve fits loose enough to allow the movable jaw to rock slightly in relation to the handle. Hollands Mfg. Co. of Erie, PA marketed this as the Keystone Pipe Wrench. |