I begin with presentation of these solutions, because they were my first developments submitted to the Patent
Office. After a study on the state of the art conducted by the Office, it turned out that numerous inventors were trying
to figure out these solutions a few decades ago. In retrospect, I realised that the rotary engines are of very
unfavourable ratio of surface area to volume of the combustion chamber, which if used in piston engines, produces
poorer energy efficiency.

Four-stroke internal combustion engine with a rotating piston
Category, number and date of application:
WYN: (21) 295479, (22) 31-07-1992

Thermodynamic rotary engine
Category, number and date of application:
UZY: (21) 98712, (22) 21-09-1993

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