73440208
Aug 22, 1983
Jul 2, 1985
Instruments and Equipment Used in Subterranean Drilling-Namely, Subsurface Recording Pressure Gauges, Formation Testing Pressure Gauges, Thermometer Elements, Subsurface Samplers, Recording Apparatus in the Nature of Coated Metal Shim Stock for Recording Pressure and Temperature; Optical Scanning Readers, Subsurface Recording Instruments, Subsurface Running Cases, Instrument Carrying Cases, Pipe Gauges, and Oil Well Surveying Instruments and Subsurface Gauge Clocks Contained in Surface Recording Instrument
Electrical and Scientific Apparatus