Alan said:Ron and others,
Mike Gulyassy does hold a patent on a one piece tip/ferrule (US7,097,570).
The Stinger?s advertising states it?s protected by patent # US5,262,490. That?s the wrong number, and I?ve pointed it out to them. The correct number is US5,462,490. It may not seem important, but if he/they ever sue on the patent and seek treble damages for willful infringement, listing the wrong number on their advertising may cause them some extra work.
Just as a matter of point, a commercial sale is not a prerequisite for patent infringement. Infringement occurs if you make even one patented article, unless it falls into a narrow class of ?experimental use.?
Alan
Actually, that patent isn't any good, (5462490) so it's a moot point.