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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3,874,810
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Apr. 01, 1975
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Drill guide
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William D. Russell |
Chula Vista, CA |
The USPTO patent summary describes it as "A rugged, versatile drill guide of simple design for positioning a drill bit relative to varied workpiece configurations." The Portalign drill guide was manufactured for many years and was sold under Sears' Craftsman brand as their "Portalign precision drill guide". The originals are no longer made but imitations are still readily available, though of variable quality. |
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4,335,512
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Jun. 22, 1982
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Attachment for a power hand saw
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George E. Robson |
Hermosa Beach, CA |
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Attachment for a power hand saw
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George S. Christensen |
San Diego, CA |
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Attachment for a power hand saw
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Martin I. Sheps |
Poway, CA |
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