System and method for rotational combustion engine

Device for effecting an axial shift of a rotary shaft for use in a variable camshaft drive mechanism

Systems and methods for purge and PCV control

Seal assembly for rotary-piston internal-combustion engine

Offset rotational internal combustion engine

Cam engine

Hybrid internal combustion engine (variants thereof)

Internal combustion engine and compressor or pump with rotor and piston construction, and electrical generator pneumatically driven by same

Multiple rotor fluid transfer engine

High-torque rotary radial internal combustion piston engine

Stationary block rotary engine/generator

Gyroscopic rotary engine

Pressure engine, in particular, an internal combustion engine, with an annular structure

Multiple rotor fluid transfer engine

Balanced rotary internal combustion engine or cycling volume machine

ROTARY ENGINE USING TRADITIONAL PISTONS OF FLEXIBLE MOTION

Dual piston rotary engine

Asymmetric complete expansion rotary engine cycle

Balanced rotary internal combustion engine or cycling volume machine

Epicyclic rotary engine