9 ELECTRONIC ACOUSTIC NAVIGATION SYSTEMS-NAMELY, TRANSPONDERS, INTERROGATOR TRANSDUCERS, INTERROGATOR/RECEIVERS, PROCESSORS, PLOTTERS AND KEYBOARD/PRINTERS FOR USE IN DEEP WATER SURVEYS, RIG MOVES, PIPE LAYING, AND NAVIGATION OF SUBMERSIBLES
Trademark Events
Oct 5, 1998
Expired Sec. 9
Jan 15, 1985
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.