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SIGMA INSTRUMENTS INC

Overview
  • Total Patents
    123
About

SIGMA INSTRUMENTS INC has a total of 123 patent applications. Its first patent ever was published in 1944. It filed its patents most often in United States, United Kingdom and Germany. Its main competitors in its focus markets electrical machinery and energy, measurement and environmental technology are OTTO TITUS BLATHY DR, INST RADE KONCAR and VITTORIO MARTINETTO.

Patent filings per year

Chart showing SIGMA INSTRUMENTS INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Beling Thomas E 14
#2 Adkins Harold T 7
#3 Morin John O 6
#4 Bengtsson Bertil S 6
#5 Yeh Thomas 6
#6 Stein Jr Laurence B 5
#7 Gamble John G 5
#8 Field Ii John H 5
#9 Thibodeau Joseph R 4
#10 Fisher Charles P 4

Latest patents

Publication Filing date Title
WO2009048697A1 Apparatus and method for measuring vapor flux density
US6539328B1 Device and process for measurement and treatment of spinal mobility
US5124642A Power line post insulator with dual inductor current sensor
US5111189A Fault indicator with timing control
US5136456A Faulted current indicator with protection against temporary overloads and transients
US5055771A Faulted current indicators with improved signal to noise ratios
US5029039A Current adaptive fault indicator
US5003426A Faulted current indicators and inrush restraints therefor
US4984124A Faulted current indicator with inrush restraint
US5097202A Faulted current indicators with improved signal to noise ratios
US4968884A Vertically sensitive outdoor lighting controls
US5045778A Fault indicator with inrush restraint
US4980790A Fault indicating means
US4864264A Bistable toggling indicator
US4763034A Magnetically enhanced stepping motor
US4859925A Power transmission systems and means for control thereof
US4782287A Watt-hour meter
US4728830A Electric motor with magnetic enhancement
US4700123A Power distribution systems and means for control thereof
US4675590A Stepping motor driver with mid-frequency stability control