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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1,739,826
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Dec. 17, 1929
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Electric Low Speed Unit
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Otto Cullman |
Chicago, Cook County, IL |
Charles Turner Brown, patent attorney. |
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1,786,192
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Dec. 23, 1930
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Support for Electric Motors
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Otto Cullman |
Chicago, IL |
Charles Turner Brown, patent attorney. |
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2,367,100
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Jan. 09, 1945
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Sprocket milling machine
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Norman B. Wienke |
Chicago, IL |
"The present invention relates to improvements in milling machines, and it has particular reference to an automatic apparatus for milling to proper shape and dimensions the sprocket wheels used in cooperation with the link-belts on the caterpillar treads of military tanks, tractors, and the like." |
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Sprocket milling machine
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Lester H. Hornbrook |
Chicago, IL |
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Sprocket milling machine
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Otto Cullman |
Chicago, IL |
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2,436,694
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Feb. 24, 1948
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Detachable sprocket wheel
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Lester H. Hornbrook Jr. |
Chicago, IL |
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Detachable sprocket wheel
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Norman B. Wienke |
Chicago, IL |
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Detachable sprocket wheel
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Otto Cullman |
Chicago, IL |
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2,613,544
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Oct. 14, 1952
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Mounting for transmission gearing and guard
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Otto Cullman |
Chicago, IL |
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