Filed: November 15, 1974 PLASTIC PROTECTIVE COVERINGS IN THE FORM OF SUBSTANTIALLY RIGID JACKETS IN VARIOUS SHAPES FOR APPLICATION TO PIPES, PARTICULARLY… Owned by:CEEL CO. Serial Number:73037176
Filed: March 1, 1982 Plastic Protective Coverings in the Form of Preformed Jackets for I-Beams, Angles, Steel Structures, Tanks and Vessels Owned by:CEEL CO. Serial Number:73352431