SERVICE OF POST-TENSIONING CONCRETE STRUCTURES-NAMELY, APPLYING STRESS TO CONCRETE AFTER HARDENING BY TENSIONING CABLES OR WIRES EXTENDING THERETHROUGH
Trademark Events
Mar 1, 1993
Expired Sec. 9
Aug 1, 1977
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.