On November 11, 1986, Therapeutic roller/walker was patented.
Patent Information
Publication number: US4621804 A
Patent Title: Therapeutic roller/walker
Publication type: Grant
Application number: US 06/715,910
Publication date: 11 Nov 1986
Filing date: 25 Mar 1985
Priority date: 25 Mar 1985
Fee status: Lapsed
Inventors: Robin R. Mueller
Original Assignee: R-Jayco Ltd.
