QUIK-SEAL
Filed: June 3, 1968
PROTECTIVE CLOSURE STRIPS FOR AND IN COMBINATION WITH STRUCTURAL MEMBERS, WHICH MEMBERS ARE SOMETIMES EMPLOYED AS ELECTRICAL…
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 72299527
DUXTAL
Filed: January 22, 1970
STEEL COATED WITH A CHEMICAL COMPOSITION
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 72349414
Y-CO-55
Filed: May 4, 1970
TUBING
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 72358818
DURA-N
Filed: July 31, 1970
PUMP BARREL TUBES FOR MECHANICALLY-OPERATED SUBSURFACE PUMPS FOR USE IN OR IN CONNECTION WITH OIL WELLS AND THE EXTRACTION…
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 72366820
YOKOTE
Filed: October 13, 1971
PLASTIC COATED PIPE AND TUBING
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 72404973
DURA-Z
Filed: May 25, 1972
PUMP BARREL TUBES FOR MECHANICALLY OPERATED SUBSURFACE PUMPS
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 72425501
TRU-SHAPE
Filed: September 15, 1972
STRUCTURAL MEMBERS OF REINFORCED PLASTIC
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 72435793
ROVAL
Filed: May 22, 1978
Raw Steel Lavatory Shape
Owned by: YOUNGSTOWN SHEET AND TUBE COMPANY
Serial Number: 73171314
