Not sure we understand your question. Various firearm patents (and there are tens of thousands of them) are on file with the US Patent Office. If you have a patent number, or a date, that can be searched using a search engine such as Google Patent. If you mean where is it marked on a firearm- it could be anywhere- or nowhere- they are not required to be marked.
No one has a patent on the "paintball gun" several companies have patents on their valves and other parts, but no one company can paten "paintball guns"
99,220, including utility patents, plant patents, design patents, and reissues.
The USPTO granted a total of 247,727 patents from 1 January 2011 to 31 December 2011, including Reissue Patents, Plant Patents, Design Patents, and Utility Patents.
The US Patent Office issued 99,200 total patents from 1 January 1990 to 31 December 1990, including 9 reissue patents, 6 plant patents, 194 design patents, and 98,991 utility patents.
43 patents
Charles Kettering had 104 patents.
The website Free Patents Online provides descriptions of patents, with downloadable PDFs of their schematics. Alternatively, the website Patents provides text descriptions but no images.
As of 2010, General Electric (GE) has 1,222 patents. Aside from this, they have filed 37, 268 patents in the US.
What Companies hold MEMS patents
As with other property rights, patents can be sold or licensed
Spyderco has 54 patents and 36 trademarks.
No; Twitter notably has not filed for any patents.