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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127,132
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May. 21, 1872
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Improvement in drilling-machines
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Albert F. Prentice |
Worcester, MA |
The assignees constituted A. F. Prentice & Co., so presumably they sold this drill to E. N. Boynton. It is likely that A. F. Prentice & Co. manufactured this drill, and also likely that Boynton & Plummer did also. |
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Improvement in drilling-machines
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Edward J. Worcester |
Worcester, MA |
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209,646
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Nov. 05, 1878
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Improvement in metal-drilling machines
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Edwin N. Boynton |
Worcester, MA |
Partner Plummer had worked for R. Ball & Co. in the 1860s, but by 1871 he seemed to be on his own. In 1871 Boynton was running E. A. Bagley & Co., which made screws. Co-inventor Carver went on to be a partner in engine lathe maker McMahon & Carver |
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Improvement in metal-drilling machines
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George M. Coburn |
Worcester, MA |
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Improvement in metal-drilling machines
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Thomas F. Carver |
Worcester, MA |
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