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SONDEX LTD

Overview
  • Total Patents
    89
About

SONDEX LTD has a total of 89 patent applications. Its first patent ever was published in 1999. It filed its patents most often in EPO (European Patent Office), United Kingdom and Canada. Its main competitors in its focus markets measurement, civil engineering and machines are BERGEN TECH CENTER AS, ZENITH OILFIELD TECHNOLOGY LTD and ZENITH OILFIELD TECH LTD.

Patent filings per year

Chart showing SONDEX LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Stuart-Bruges William Peter 38
#2 Mason Guy Harvey 16
#3 Searight Thomas Lempriere 15
#4 Allan Victor Laing 8
#5 Wootten Keith Robert 8
#6 Boxell Timothy George 7
#7 Fraser Alan Thomas 7
#8 Strong Philip Anton 7
#9 Yuratich Michael Andrew 7
#10 Bridges Andrew Paul 6

Latest patents

Publication Filing date Title
CA2791507A1 Sensor commutated electric motor with sensorless angular position determination and method
CA2777273A1 Method and apparatus for measuring borehole mud resistivity
EP2469243A2 Canted helix collapsible flowmeter and method of measuring a fluid flow
EP2468424A2 Mono-directional ultrasonic transducer for borehole imaging
CN103261915A Neutron porosity logging tool using microstructured neutron detectors
CA2751840A1 Refractive index tool and method
US2012152027A1 Sensitive differential pressure sensor and method
GB0821177D0 A downhole modulator apparatus
HK1119251A1 Apparatus and method for providing communication between a probe and a sensor
GB0711096D0 Apparatus for determining the concentration of a conductive fluid present in a fluid filled borehole
US2008060808A1 Method of and system for determining the free point in a drill pipe
CN101069105A Multiple transmitter and receiver well logging device with error calibration system
GB0412770D0 A variable differential transformer in which the coil voltage is measured at the zero current point
GB0110905D0 Shock absorber apparatus
GB0106149D0 Apparatus for anchoring a tool within a tubular
GB0030044D0 Densitometer
GB0017163D0 An improved capacitance measurement probe
GB0010449D0 Logging sondes for use in boreholes
GB0009884D0 Roller centralizer for wireline tools
GB9914788D0 Downhole pressure measurement