Click for the TGIF home page.
Your host Phil Ament Click to visit Century of Innovation Feature
HISTORIC PATENTS 1790 - 1836  
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.
X1 07.31.1790 Samuel Hopkins pot ash process
MAKING POT AND PEARL ASHES
X72 03.14.1794 Eli Whitney cotton gin
COTTON GIN
X8277 06.21.1834 Cyrus H. McCormick reaper
REAPER
X9430 02.25.1836 Samuel Colt revolver
REVOLVING GUN
 
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
 

Designated trademarks and brands are the property of their respective owners.
This document was compiled by the editors at The Great Idea Finder
 
   
     about time   dialogue   national heroes   patents   the lists    a-navbarend.gif (873 bytes)
home  | idea history  |  idea showcase  |  special features  | resource center  | guest services  history articles  |  search   a-navbarend.gif (873 bytes)
Copyright 1997 - 2007  The Great Idea Finder  All rights reserved.