1998 Acquired by Dover Corporation 1990 Quartzdyne Downhole Pressure Transducers 1983-1989 Quartz Pressure Sensor Manufacturing Downhole Sensor, Laboratory Instrument Mensor 1979-1987 Quartz Sensor R&D Acceleration, Weigh......1998 Acquired by Dover Corporation 1990 Quartzdyne Downhole Pressure Transducers 1983-1989 Quartz Pressure Sensor Manufacturing Downhole Sensor, Laboratory Instrument Mensor 1979-1987 Quartz Sensor R&D Acceleration, Weight, Pressure, Temperature, Force Sundstrand, Ohaus, Paroscientific, Fisher Controls, Sperry Flight Systems 1965-1979 Quartz Device R&D Dr. Errol EerNisse--Sandia/DOE