26 GEOPHYSICAL INSTRUMENTS-NAMELY, MARINE AND AIRBORNE MAGNETOMETERS AND GAMMA RAY RADIATION DETECTORS AND APPARATUS WHICH RECORD DATA FROM SAID INSTRUMENTS
Trademark Events
Oct 18, 1993
Expired Sec. 9
May 8, 1978
Registered - Sec. 8 (6-Yr) Accepted & Sec. 15 Ack.