Personnel safety system utilizing time variable frequencies

Personnel safety system utilizing time variable frequencies

Petroleum exploration and prediction apparatus and methods

Petrophysical interpretation of multipass array resistivity...

Petrophysical property estimation using an acoustic...

Phase control of servo hydraulic vibrators

Phase discrimination for micro electrical measurement in...

Phase of rectified trace seismic parameter

Phase-alternated carr-purcell nmr echo sequence

Phasor processing of induction logs including shoulder and...

Phasor processing of induction logs including skin effect...

Phosphorescent compositions and methods for identification...

Photoelectric detector

Photoelectric positional control of airborne craft

Photoelectric sensor

Photon authenticated rfid transponder

Physical data acquisition system and method for use in...

Piezoelectric accelerometer with laterally stabilizing element

Piezoelectric sensor with at least one pair of long,...

Pilot operated mud-pulse valve