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A legal that inventors have to come up with so other people don't steal or wordgank/wordtheir inventions.
"I didn't get a patent on my "Scat-a-pult" and someone put one on the market already.
patent by meetoo September 6, 2003
To take an existing commodity and claim ownership over its production rights.
Let's patent rice and sell it to the asians.
patent by Adam Roberts' Cat November 19, 2011
Pattern. Used when a person has a trick up his sleeves.
Oui ah chootee, you always patent more than badminton.
Patent by mightydodo November 2, 2010

PATENT TROLL 

A company-or divison of a company-whose sole reason for being is to sue other companies/individuals for patent infringment.Sometimes the troll is a large tech company with many patents.Other times it's a smaller company that purchases patents...then goes huntin'.Don't let this stop you from makin' shit.
UNBIASED ANCHORMAN:"Great news CRACKBERRY ADDICTS!The USPTO
ruled today that PATENT TROLL NTP's claims
against RIM are invalid.Whew...that was
close!More after these emai-uh messages."
PATENT TROLL by L.MARTIN December 22, 2005

patent leather

a leather that has been given a high gloss finish.
"I went with them to the market and they bought some patent leather shoes and a very nice black pair of lace-ups with silver shoelaces,"(Briscoe 98).
patent leather by morgann t March 27, 2007

patent invalidator 

A person who researches prior art of a particular patent with the goal of finding the best combination of references that when combined, suggest the patent is likely not valid.
The patent invalidator and the firm’s patent litigator are working together to fight the patent troll’s claim assertions.