74091069
Aug 24, 1990
May 19, 1992
earth drilling and oil and gas well production, instrumentation and measurement devices; namely, downhole measurement-while-drilling tools, pump controllers, remote control valves, and production fluid monitors; and instrumentation and measurement devices for process, environmental, and medical testing; namely, in-process weighting apparatus, level controllers, and process flow stream analyzers
Electrical and Scientific Apparatus