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The patents issued during the period July, 1790 until July, 1836
have come to be known as the "X Patents". All patents issued
prior to 1836 were issued by name and date rather than being
assigned a number. The Patent Office had already issued nearly
10,000 patents, when a fire destroyed many of the original
records in December of 1836. Using private files, the office was
able to restore 2,845 patents. The restored records were issued
a number beginning with an "X" and called the "X-Patents." Thus
the first patent ever issued was actually designated patent X1.
The patents that could not be restored were cancelled. The USPTO
database can only be searched by Issue Date, Patent Number, and
Current US Classification. To display the actual patent and its
accompanying drawings requires a "TIFF" plug-in for your
browser. |
U.S.
Patent
Number |
Date
Granted |
Inventor (s) |
Description
Common in bold. Patent in
CAPS. |
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X1 |
07.31.1790 |
Samuel Hopkins |
pot ash process
MAKING POT AND PEARL ASHES |
|
X72 |
03.14.1794 |
Eli Whitney |
cotton gin
COTTON GIN |
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X8277 |
06.21.1834 |
Cyrus H. McCormick |
reaper
REAPER |
|
X9430 |
02.25.1836 |
Samuel Colt |
revolver
REVOLVING GUN |
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Historic Patents 1976 - Present |
Historic Patents 1836 - 1975 |
TO
LEARN MORE
RELATED INFORMATION:
Book Resources on the subject of Patents. from The Great Idea Finder
Historic Patents
of the Unired States from The Great Idea Finder
First
Patent Issued pot ash improvement from The Great Idea Finder
Patent Information including history and
purpose. from The Great Idea Finder
Prolific Inventors
based upon the number of
Patents issued
from The Great Idea Finder
Rumor
Has It everything has been invented.
from The Great Idea Finder
Web Resources dedicated to
Patents. from The Great Idea Finder
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Designated
trademarks and brands are the property of their respective owners. |
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This document was compiled by the editors at The Great Idea Finder |
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