KITZ CORPORATION
92Patents
46Active
92Granted
45Portfolio score
Filing activity: Jul 21, 1981 → Jan 30, 2023 · 10 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4801158A | Pipe joint | Emerging Cross-Sectional Technologies | 62 | Expired |
| US6736328B1 | Control system with communication function and facility control system | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US4846221A | Ball valve with built-in check valve | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5522603A | Packing rings, method for production of the packing rings, and seal device using the packing rings | Emerging Cross-Sectional Technologies | 33 | Expired |
| US6029693A | Valve driving apparatus | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6623637B1 | Hollow-fiber membrane module | Performing Operations; Transporting | 20 | Expired |
| US4674528A | Butterfly valve | Emerging Cross-Sectional Technologies | 19 | Expired |
| US7076961B2 | Control system with communication function and facility control system | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US6224765A | Filter element | Performing Operations; Transporting | 15 | Expired |
| US6599378B1 | Copper-based alloy, method for production of the alloy, and products using the alloy | Chemistry; Metallurgy | 15 | Expired |
| US4557286A | Ball valve with emergency sealing device | Emerging Cross-Sectional Technologies | 15 | Expired |
| USD498820S1 | Valve body | General | 14 | Expired |
| US7163192B2 | Actuator for valve | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US9756838B2 | Circulation type aquaculture method and circulation type aquaculture device | Chemistry; Metallurgy | 13 | Active |
| US4940562A | Filter element and method for manufacture thereof and micro-filtration filter having the filter element | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5938173A | Device for preventing gland nut in valve from loosening | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| USD748226S1 | Rotary valve | General | 12 | Active |
| US6676109B2 | Rotary valve | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4932436A | Ball valve | Emerging Cross-Sectional Technologies | 12 | Expired |
| USD537919S1 | Ball valve | General | 11 | Expired |
| US4792117A | Material for valve seats | Chemistry; Metallurgy | 8 | Expired |
| US4702150A | Spring-return type actuator | Performing Operations; Transporting | 8 | Expired |
| US6768234B2 | Electric actuator and fixing structure of the actuator | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6758458B2 | Butterfly valve | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5573253A | Packing rings, method for production of the packing rings, and seal device using the packing rings | Emerging Cross-Sectional Technologies | 7 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.