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US Patent: 20X
Manufacturing Gun Powder
Powder Mill for Manufacturing Gun Powder
Patentee:
Henry Keyser - Philadelphia, PA

USPTO Classifications:

Tool Categories:
trade specific : gunsmith

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Aug. 10, 1791

Patent Pictures:
USPTO pdf tiff
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Description:
Only about 2,000 of the almost 10,000 documents were recovered.

Because of the Patent Office fire in Dec. 1836, little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.

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