HYDRO/CYL
Filed: January 22, 1973
HYDRAULICALLY OR PNEUMATICALLY OPERATED VALVE ACTUATORS
Owned by: LEDEEN FLOW CONTROL SYSTEMS, INC.
Serial Number: 72446518
LEDEEN
Filed: August 15, 1979
Valve Actuators, with Electric Motors, Switches and Starters Therefor; Hydraulic Pumps of the Rotary, Reciprocating Piston…
Owned by: LEDEEN FLOW CONTROL SYSTEMS, INC.
Serial Number: 73227537
ACTU/KIT
Filed: August 20, 1981
VALVE ACTUATING DEVICES AND COMPONENTS THEREOF
Owned by: LEDEEN FLOW CONTROL SYSTEMS, INC.
Serial Number: 73324408
HYDROQUAD
Filed: July 23, 1982
Fluid Powered Valve Actuators for Controlling the Flow of Fluids in Pipelines
Owned by: LEDEEN FLOW CONTROL SYSTEMS, INC.
Serial Number: 73376244
AUTO-DTECT
Filed: February 28, 1983
A SYSTEM FOR DETECTING AND INSULATING PIPELINE BREAKS
Owned by: LEDEEN FLOW CONTROL SYSTEMS, INC.
Serial Number: 73415368
HYDRO/STEP
Filed: February 15, 1984
VALVE ACTUATORS FOR USE WITH OIL WELL CHOKE VALVES
Owned by: LEDEEN FLOW CONTROL SYSTEMS, INC.
Serial Number: 73465813
TELE-WELL
Filed: August 2, 1985
REMOTE MONITORS AND CONTROLS FOR GAS WELLS
Owned by: LEDEEN FLOW CONTROL SYSTEMS, INC.
Serial Number: 73551350
