Robert M Barton: Roadway pavement planing machine. Barco Manufacturing Company, McWilliams Mann & Zummer, February 5, 1980: US04186968 (49 worldwide citation)

A roadway pavement planing machine comprising a frame having forward and rearward ends, a pair of crawler drive assemblies disposed in side by side relation at the frame forward end upon which the frame forward end rests, with such drive assemblies being connected to the frame for independent vertic ...

Donald J Parquet, Carl O Pedersen, Robert M Barton: Automatic control system for backhoe. J I Case Company, Dressler Goldsmith Clement Gordon & Shore, April 5, 1977: US04015729 (32 worldwide citation)

An automatic control system for a backhoe utilizing a bucket at the end of a rigid boom is disclosed herein. The automatic control system includes an actuator cooperating with a control valve that controls the flow of fluid to hydraulic rams that pivot the boom. The control system also includes posi ...