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SIGMA INSTR CO LTD

Overview
  • Total Patents
    108
About

SIGMA INSTR CO LTD has a total of 108 patent applications. Its first patent ever was published in 1939. It filed its patents most often in United Kingdom, France and United States. Its main competitors in its focus markets measurement, machine tools and mechanical elements are SIGMA INSTR COMPANY LIMITED, FINIKE ITALIANA MARPOSS and MAHR CARL.

Patent filings in countries

World map showing SIGMA INSTR CO LTDs patent filings in countries

Patent filings per year

Chart showing SIGMA INSTR CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Loxham John 21
#2 Boosey Frederick Robert 20
#3 John Loxham 11
#4 Hamilton John Hunter 7
#5 Robert Boosey Frederick 6
#6 Field John Sugden 4
#7 Church John Henry 4
#8 Jarvis Maurice Henry 2
#9 Taylor Stanley Ernest Beaumont 2
#10 Ireland Eric 2

Latest patents

Publication Filing date Title
KR20010063297A Transmission and Reception System of Automatic Playing the Piano Using Internet
DE1955824A1 Device for carrying out measurements on a measurement object while the measurement object is being processed
GB1170340A Improvements in or relating to Apparatus for Measuring the Size and Position of Objects
GB1148798A Improvements in or relating to rotary disc hoppers
GB1057078A Improvements in or relating to transducers for use in instruments for measuring surface roughness
GB920168A Improvements in or relating to thickness measuring instruments
GB981222A Improvements in or relating to multi-dimension inspection machines
GB948484A Improvements in or relating to measuring apparatus
GB919816A Improvements in or relating to linear dimension measuring devices
GB885669A Improvements in or relating to internal diameter measuring apparatus
US2894741A Mechanical guiding devices
GB843966A Improvements in or relating to mechanical guiding devices
GB849288A Improvements in or relating to apparatus for controlling machine tools
GB857500A Improvements in or relating to digital storage units
GB827037A Improvements in or relating to apparatus for controlling machine tools
US2981514A Valves
GB879986A Improvements in or relating to pneumatic or hydraulic relay units
GB879984A Apparatus for recording the result of gauging
GB879985A Improvements in or relating to pneumatic or hydraulic measuring apparatus
GB879987A Improvements in or relating to grading machines