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.
# | 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 |
# | Industry | |
---|---|---|
#1 | Mechanical elements | |
#2 | Measurement | |
#3 | Machines | |
#4 | Control | |
#5 | Chemical engineering |
# | Technology | |
---|---|---|
#1 | Venting or aerating devices | |
#2 | Unspecified technologies | |
#3 | Measuring volume | |
#4 | Testing of structures | |
#5 | Pipes | |
#6 | Pipe-line systems | |
#7 | Servomotors | |
#8 | Systems controlling non-electric variables | |
#9 | Separation | |
#10 | Unspecified technologies |
# | 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 |
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 |