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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120,044
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Oct. 17, 1871
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Improvement in machines for making machine screws
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Francis Curtis |
Brattleboro, VT |
This patent is the first automatic screw machine. The inventor would make further improvements but this first effort is still quite sophisticated, starting from wire stock and producing complete screws without any further finish work required. He manufactured them himself in Brattleboro for a time. Who produced later versions of this invention—if anyone did—remains uncertain. |
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RE9,086
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Feb. 17, 1880
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Machine for making machine-screws
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Francis Curtis |
Brattleboro, VT |
This patent reissue has a 3/4 share assigned to Henry Devens, who was a wealthy local businessman who invested in the development of Curtis's screw machine. |
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280,296
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Jun. 26, 1883
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Metal-screw machine
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Albert B. Curtis |
Chicopee, MA |
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Metal-screw machine
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Francis Curtis |
Chicopee, MA |
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