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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758,361
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Apr. 26, 1904
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Power Hammer
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Henry W. Hathorn |
Mason City, Cerro Gordo County, IA |
In 1908, Hathorn sold his rights to this patent to West Tire Setter Co. of Rochester, NY.
Patented in Canada, #89,850. |
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89,850
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Nov. 01, 1904
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Power Hammer
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Henry W. Hathorn |
Mason City, Cerro Gordo County, IA |
This is the Canadian equivalent of U. S. patent #758,361. |
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822,122
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May. 29, 1906
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Tool-holder for lathes
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Henry W. Hathorn |
Grinnell, IA |
The inventor established the Hathorn Foundry & Machine Co. in Mason City, IA, in 1890, manufacturing a helve hammer, but sold that business in 1904 to A. A. Koch who renamed it to the Vulcan Iron Works. Both Koch and Hathorn soon relocated to Grinnell where Koch operated a different business making power hammers, the Grinnell Mfg. Co. We do not know what Hathorn was doing in Grinnell. |