Samuel Colt received a British patent on his improved design for a revolver in 1835, and two U.S. patents in 1836, one on February 25 (later numbered U.S. Patent 9430X) and another on August 29 (). That same year, he founded his first corporation for its manufacture, the Patent Arms Manufacturing Company of Paterson, New Jersey, Colt's Patent. The first firearm manufactured at the new Paterson plant, however, was the Colt First Model Ring Lever rifle beginning in 1837. This was followed shortly thereafter in late 1837 by the introduction of the Colt Paterson. This corporation suffered quality problems in production. Making firearms with interchangeable parts was still rather new (it had reached commercial viability only about a decade before), and it was not yet easy to replicate across different factories. Interchangeability was not complete in the Paterson works, and traditional gunsmithing techniques did not fill the gap entirely there. The Colt Paterson revolver found patchy success and failure; some worked well, while others had problems. The United States Marine Corps and United States Army reported quality problems with these earliest Colt revolvers. Production had ended at the New Jersey corporation by 1842.