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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67,181
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Jul. 30, 1867
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Improvement in moulds for casting metal
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John Farrar |
Providence, RI |
An 1872 ad from the Pacific Iron Works in San Francisco says, "We have fitted up a Foundry for the exclusive manufacture of Cast Iron GAS AND WATER PIPE by Farrar's patent process. This pipe is superior to any of Eastern or European manufacture." |
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Improvement in moulds for casting metal
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William Groves |
Providence, RI |
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86,144
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Jan. 26, 1869
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Flask for molding pipe
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John Farrar |
Providence, RI |
An 1872 ad from the Pacific Iron Works in San Francisco says, "We have fitted up a Foundry for the exclusive manufacture of Cast Iron GAS AND WATER PIPE by Farrar's patent process. This pipe is superior to any of Eastern or European manufacture." |
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Flask for molding pipe
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L. F. Whiting |
Boston, MA |
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86,145
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Jan. 26, 1869
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Lining for metal casting molds
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John Farrar |
Providence, RI |
An 1872 ad from the Pacific Iron Works in San Francisco says, "We have fitted up a Foundry for the exclusive manufacture of Cast Iron GAS AND WATER PIPE by Farrar's patent process. This pipe is superior to any of Eastern or European manufacture." |
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Lining for metal casting molds
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L. F. Whiting |
Boston, MA |
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