Assignee
KITZ CORP
JP87 patents
Top patents by PatentIndex Score
US4801158AJan 31, 1989
Pipe joint
KITZ CORP121 citations94
US5522603AJun 4, 1996
Packing rings, method for production of the packing rings, and seal device using the packing rings
KITZ CORP45 citations93
US6768234B2Jul 27, 2004
Electric actuator and fixing structure of the actuator
KITZ CORP17 citations92
US6736328B1May 18, 2004
Control system with communication function and facility control system
KITZ CORP48 citations92
US6308731B1Oct 30, 2001
Vent valve
KITZ CORP46 citations92
US4940562AJul 10, 1990
Filter element and method for manufacture thereof and micro-filtration filter having the filter element
KITZ CORP41 citations92
US6029693AFeb 29, 2000
Valve driving apparatus
KITZ CORP32 citations91
US7163192B2Jan 16, 2007
Actuator for valve
KITZ CORP21 citations90
US7076961B2Jul 18, 2006
Control system with communication function and facility control system
KITZ CORP19 citations89
US6599378B1Jul 29, 2003
Copper-based alloy, method for production of the alloy, and products using the alloy
KITZ CORP39 citations89
US4846221AJul 11, 1989
Ball valve with built-in check valve
KITZ CORP74 citations89
US7297215B2Nov 20, 2007
Copper base alloy, and cast ingot and parts to be contacted with liquid
KITZ CORP15 citations88
US6623637B1Sep 23, 2003
Hollow-fiber membrane module
KITZ CORP39 citations86
US6224765B1May 1, 2001
Filter element
KITZ CORP30 citations86
US4674528AJun 23, 1987
Butterfly valve
KITZ CORP33 citations86
US9546736B2Jan 17, 2017
Trunnion ball valve for high pressure, and hydrogen station
KITZ CORP9 citations84
USD748226SJan 26, 2016
Rotary valve
KITZ CORP12 citations84
USD537919SMar 6, 2007
Ball valve
KITZ CORP11 citations84
US6557827B1May 6, 2003
Leaf spring valve
KITZ CORP14 citations84
US6974509B2Dec 13, 2005
Brass
KITZ CORP15 citations82
US6676109B2Jan 13, 2004
Rotary valve
KITZ CORP19 citations81
US5938173AAug 17, 1999
Device for preventing gland nut in valve from loosening
KITZ CORP22 citations80
US5573253ANov 12, 1996
Packing rings, method for production of the packing rings, and seal device using the packing rings
KITZ CORP15 citations79
USD498820SNov 23, 2004
Valve body
KITZ CORP14 citations76
US9756838B2Sep 12, 2017
Circulation type aquaculture method and circulation type aquaculture device
KITZ CORP16 citations75
US4932436AJun 12, 1990
Ball valve
KITZ CORP20 citations75
US4337691AJul 6, 1982
Valve driving apparatus
KITZ CORP23 citations75
US6885119B2Apr 26, 2005
Electric actuator and structure for fixing the same
KITZ CORP9 citations74
US6758458B2Jul 6, 2004
Butterfly valve
KITZ CORP11 citations74
US4792117ADec 20, 1988
Material for valve seats
KITZ CORP12 citations74
US11655898B2May 23, 2023
Cryogenic globe valve
KITZ CORP5 citations73
US5505858AApr 9, 1996
Polyolefin filter element and method for the production thereof
KITZ CORP5 citations73
USD983331SApr 11, 2023
Fluid control valve
KITZ CORP4 citations72
US11428326B2Aug 30, 2022
Centric butterfly valve
KITZ CORP4 citations72
US6267137B1Jul 31, 2001
Ball check valve and pumping apparatus using the check valve
KITZ CORP9 citations72
US7100493B2Sep 5, 2006
Pneumatic actuator
KITZ CORP7 citations71
US5797583AAug 25, 1998
Valve driving apparatus
KITZ CORP13 citations71
US10767768B2Sep 8, 2020
Trunnion-type ball valve, valve seal structure, and valve packing
KITZ CORP3 citations70
US10018276B2Jul 10, 2018
Trunnion-type ball valve
KITZ CORP6 citations70
US4765592AAug 23, 1988
Material for valve seats
KITZ CORP9 citations70
US10465804B2Nov 5, 2019
Structure and method for fastening ball seat for ball valve, trunnion ball valve, and hydrogen station using the ball valve
KITZ CORP3 citations69
US6916011B2Jul 12, 2005
Ball valve and production method therefor
KITZ CORP10 citations69
US4557286ADec 10, 1985
Ball valve with emergency sealing device
KITZ CORP26 citations69
USD274085SMay 29, 1984
Valve handwheel
KITZ CORP8 citations69
USD274087SMay 29, 1984
Valve handwheel
KITZ CORP8 citations69
US11761556B2Sep 19, 2023
Valve wear state grasping method and system using valve stem angular velocity
KITZ CORP2 citations68
US5507885AApr 16, 1996
Copper-based alloy
KITZ CORP12 citations68
US4702150AOct 27, 1987
Spring-return type actuator
KITZ CORP12 citations68
US4355566AOct 26, 1982
Valve driving apparatus
KITZ CORP18 citations68
US4417929ANov 29, 1983
Special brass with dezincification corrosion resistance
KITZ CORP13 citations66
Showing the top 50 of 87 patents by PatentIndex Score.