To improve and simplify the US patent system somewhat, a group of American enthusiasts presented the online resource
WikiPatents.com .
By visiting the site, everyone will be able to get acquainted with a huge database in which millions of patents from various industries are stored, and the user can not only find the document of interest, but also evaluate, translate, discuss and even vote for it. Access to information published on the pages of WikiPatents is absolutely free.
By the way, one of the most popular today is patent No. 6526683, which describes an improved scheme of the gun.