Revolution Engine Technologies Pty Limited (a wholly owned subsidiary of Revetec Limited) holds patents or has made patent applications for the CCE design in 28 countries, including the United States of America, Europe (multiple Countries), Australia, China, the United Kingdom and Japan. The beneficial ownership of the patents and patent applications was assigned to Revetec on 14 September 2005.

Country                      Number
Australia                      693714
Canada                      2261596
China                    96195549.X
Europe                  96922697.6
Hong Kong            99100377.5
Japan                 Hei 9-506089
New Zealand               312052
Russia                       2161712
Singapore                      51300
South Korea           98-700359
United States             5992356
Vietnam                 S19980148

US PATENT
U.S. Patent 5,992,356 "Opposed piston combustion engine "; November 30, 1999; Howell-Smith; Bradley David (AU).

ABSTRACT
An engine comprises two counter rotating multilobate cams which are acted upon by a pair of diametrically opposed pistons which are rigidly interlinked by connecting rods. Differential gearing is provided to time the counter rotation of the cams. The following is an examiner's statement of reasons for allowance: The prior art fails to teach or fairly suggest the invention as a whole including a shaft having a first multilobate cam axially fixed to said shaft and an adjacent second multilobate cam differentially geared to said first multilobate cam for axial counter rotation about said shaft, at least one pair of cylinders, the cylinders of each pair being diametrically opposed with respect to said shaft with said multilobate cams interposed therebetween, and a piston in each said cylinder, said pistons of a pair of cylinders being rigidly interconnected.

A further PCT has been lodged on the "X" engine configuration, which is now "Patent Pending".