Nippon Gear Co., Ltd.
10Patents
1Active
10Granted
30Portfolio score
Filing activity: Nov 6, 1984 → Jun 6, 2005 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5224512A | Valve stem driving apparatus | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4794309A | Electric actuator for a control valve | Physics | 22 | Expired |
| US5018403A | Globoid worm gear speed reduction apparatus | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4998385A | Method of modified gear cutting of a globoid worm gear | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4811618A | Motion conversion mechanism | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5059879A | Electric actuator control apparatus | Physics | 12 | Expired |
| US5836567A | Apparatus for continuous detection of load in an electric valve actuator | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5743133A | Load detectable valve | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4716290A | Rotary encoder with intermittent feed means | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7690624B2 | Valve drive device | Emerging Cross-Sectional Technologies | 3 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.