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M & J DEV CO

Overview
  • Total Patents
    114
About

M & J DEV CO has a total of 114 patent applications. Its first patent ever was published in 1968. It filed its patents most often in Canada, France and Germany. Its main competitors in its focus markets mechanical elements, measurement and machines are GROVE M H, M & J VALVE CO and TYCO FLOW CONTROL INC.

Patent filings in countries

World map showing M & J DEV COs patent filings in countries
# Country Total Patents
#1 Canada 35
#2 France 24
#3 Germany 23
#4 Italy 14
#5 United Kingdom 7
#6 Japan 6
#7 Netherlands 3
#8 Australia 1
#9 United States 1

Patent filings per year

Chart showing M & J DEV COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Grove Marvin H 27
#2 Dunegan Ronald G 8
#3 Ottenstein Sidney A 6
#4 Grove Marvin Henry 6
#5 Wailes Rodney A 4
#6 Grove M 3
#7 Kim Kee W 3
#8 Lathrop Francis M Ii 3
#9 Van Arsdale Lyle R 2
#10 Morrison Bert L 2

Latest patents

Publication Filing date Title
DE2702809A1 VALVE
JPS5220862A M & j dev co
CA1053022A Liquid meter prover apparatus
FR2299572A2 Sliding piston valve for pressurised fluid - has L-shaped sealing rings with oblique V-shaped sealing faces
CA985129A Pipeline flow control system and method
US3809113A Sphere handling apparatus and method
AU4507872A Meter prover apparatus and method
CA958244A Meter prover apparatus and method
GB1262320A Pipeline by-pass flow control system and method
DE1813698A1 Shut-off valve
GB1222529A Improvements in or relating to valves
CA881381A Flow tee construction
CA819481A Meter prover and diverter valve therefor
CA905521A Leak detecting apparatus for valves
CA888042A Gate valve
CA894657A Gate valve
CA894659A Valve construction
CA917037A Pipeline by-pass flow control system and method