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HEDLEY PURVIS LTD

Overview
  • Total Patents
    95
About

HEDLEY PURVIS LTD has a total of 95 patent applications. Its first patent ever was published in 1986. It filed its patents most often in United Kingdom, Australia and EPO (European Patent Office). Its main competitors in its focus markets machine tools, mechanical elements and machines are JUNKERS JOHN K, YU JIANQIAO and WRIGHT TOOL CO.

Patent filings per year

Chart showing HEDLEY PURVIS LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Campbell David 37
#2 Walton John Nigel 31
#3 Thompson Ian Clifford 11
#4 Walton John N 10
#5 More Nicholas 9
#6 John Nigel Walton 5
#7 Thompson Ian C 4
#8 Ritchie Sandy 4
#9 Horn John 3
#10 Hirst John Andrew Brian 2

Latest patents

Publication Filing date Title
GB0227202D0 Hot tapping tool
GB0214927D0 Seal assembly
GB0128082D0 Hot tapping tool
GB0115637D0 Seal assembly
GB0028415D0 Hot tapping tool
AU3436099A Pipe testing apparatus
GB9601864D0 Pressure sensing device
GB9505545D0 Torque wrench
GB9411331D0 Drive insert for bolt tensioning device
GB9411383D0 Mounting assembly for a plurality of bolt tensioning devices
GB9411313D0 Improved reaction nut
GB9411384D0 Method of tensioning and de-tensioning a bolt
GB9411332D0 Improved tensioning device
GB9411333D0 Improved tensioning device
GB9202776D0 Hydraulic torque wrench
GB9006268D0 Improved torque wrench
GB8915844D0 Quick-fastening nut
GB8902659D0 Improved hydraulic torque wrench
GB8823474D0 Improved hydraulic tensioner
GB8701194D0 Torque wrenches