This appears to be the patent: http://www.patentstorm.us/patents/5490216.html http://www.patentstorm.us/patents/5490216.html From the abstract, you'd think th

This appears to be the patent: http://www.patentstorm.us/patents/5490216.html http://www.patentstorm.us/patents/5490216.html From the abstract, you'd think this guy could sue every software company that uses a license key or registration number.