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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1,030,988
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Jul. 02, 1912
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Drill-chuck
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George W. Emrick |
Brooklyn, NY |
Patent date seen on an Eastern Flexible Conduit Co. (ETTCO) drill chuck, and on an Automatic Drill Chuck Corp. "Quictite" drill chuck. |
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141,809
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Jul. 23, 1912
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Drill chuck
|
George W. Emrick |
Brooklyn, NY |
This is the Canadian equivalent to US patent 1,030,988. |
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1,104,255
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Jul. 21, 1914
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Drill-chuck
|
George W. Emrick |
Brooklyn, NY |
This patent has improvements to the inventor's earlier patent 1,030,988 intended to make the chuck more durable. |