Birch, Stewart Kolasch and Birch
Method of power generation and its apparatus utilizing gravitation force and buoyancy
 The present invention relates to an apparatus for the generation of power and its method comprising two cylinders, and pistons disposed in the cylinders, and a lever arm containing weighted balls disposed therein and connected to the pistons, whereby the balls are transferred from one end portion of the lever arm to the other end portion thereof and the lever arm, moves up and down about its axis by the force of floats or pistons and the weighted balls. 
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additional inventional inventional
Se E. Myung K.
Lee Kim