Katsuya Tajima
13Patents
6h-index
18Co-inventors
63Inventor score
Filing activity: Nov 22, 1996 → Sep 29, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7320314B2 | General-purpose engine fuel tank fuel vapor treatment system | Performing Operations; Transporting | 20 | Expired |
| US7104258B2 | General-purpose engine | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6378467B1 | Portable power working machine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US5727506A | Two-stroke internal combustion engine | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US6871623B2 | Working machine having a single operation unit | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6643939B2 | Chain saw with vibration-isolating devices | Performing Operations; Transporting | 10 | Expired |
| US5899179A | Two-cycle internal combustion engine | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6135071A | Two-stroke internal combustion engine | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6742623B2 | Muffler for internal combustion engine | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US6647946B2 | Working machine having internal combustion engine | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US10113509B2 | Carburetor for internal combustion engine | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11828242B2 | Internal combustion engine | Emerging Cross-Sectional Technologies | 0 | Active |
| US5913291A | Two-cycle internal combustion engine | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.