John R. Coxon

occupation:
Aeronautical engineer,
Marine propeller inventor/ patentee
Nationality:
British

United State Patent, Pat. No. 4304524, Filing Date: 9 Jul 1980, Issue Date: 8 Dec 1981

(http://www.google.co.uk/patents/US4304524?printsec=abstract&dq=self+pitching+propellers+coxon#v=onepage&q&f=true)