Looks like they let it expire. Never made us a dime. Perfect. THUMP!
US9405736B1 United States Download PDF Find Prior Art Similar Inventor Jeff Davison Current Assignee Vertical Computer Systems Inc Worldwide applications 2001 US 2013 US Application US14/072,635 events 2001-06-15 Priority claimed from US09/882,494 2013-11-05 Application filed by Vertical Computer Systems Inc 2013-11-05 Priority to US14/072,635 2016-08-02 Application granted 2016-08-02 Publication of US9405736B1 2021-10-04 Adjusted expiration Status Expired - Lifetime