Inventor

MCGREGOR JIMMIE R

US3 patents

Patents

3 patents

US4134949AJan 16, 1979

Method to form a bell end in a plastic pipe

HARSCO CORP33 citations87

US4161384AJul 17, 1979

Apparatus to form a bell end in a plastic pipe

HARSCO CORP19 citations77

US4741562AMay 3, 1988

Multi-cell conduit connection joint

HARSCO CORP3 citations57