Hisato Ohsawa
15Patents
10h-index
11Co-inventors
69Inventor score
Filing activity: May 1, 1996 → Nov 6, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6295953A | Portable power working machine | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5758546A | Hand lever device | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6378467B1 | Portable power working machine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US5718052A | Hand lever device | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5868377A | Hand lever apparatus including a main lever having a brake plate capable of pressing against a sub-lever | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6508004B2 | Safety cover for cutting blade of portable trimmer | Human Necessities | 16 | Expired |
| US5685271A | Hand lever device | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6871623B2 | Working machine having a single operation unit | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5664543A | Hand lever device | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6643939B2 | Chain saw with vibration-isolating devices | Performing Operations; Transporting | 10 | Expired |
| US5871202A | Hand lever apparatus having a toggle mechanism | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7699902B2 | Refuse-trapping cover for use in portable working machine | Performing Operations; Transporting | 8 | Active |
| US6761136B2 | Portable power working machine | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US9988970B2 | Suction tube unit of stratified scavenging engine | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US6647946B2 | Working machine having internal combustion engine | Mechanical Engineering; Lighting; Heating | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.