Norikazu Shimizu
31Patents
10h-index
48Co-inventors
75Inventor score
Filing activity: Nov 22, 1996 → Jul 14, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6826895B2 | Electric lawn mower | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5906088A | Electric lawn mower | Emerging Cross-Sectional Technologies | 42 | Expired |
| US6658829B2 | Electric lawn mower | Human Necessities | 36 | Expired |
| US7487608B2 | Walk-behind self-propelled snow removing machine | Emerging Cross-Sectional Technologies | 26 | Active |
| US6018937A | Lawn maintenance apparatus having a rotatable, key operated switch | Electricity | 19 | Expired |
| US7116065B2 | Electric vehicle | Emerging Cross-Sectional Technologies | 15 | Expired |
| US7997016B2 | Self-propelled snow remover | Fixed Constructions | 15 | Active |
| US6499236B2 | Snow removing machine | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6977473B2 | Travel control method of electric vehicle | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7584804B2 | Walk-behind electric working machine | Performing Operations; Transporting | 10 | Expired |
| US7673402B2 | Self-propelled work machine | Fixed Constructions | 10 | Active |
| US7100312B2 | Working machine | Performing Operations; Transporting | 8 | Expired |
| USD842445S1 | Filter for an industrial dust collector | General | 7 | Active |
| US6449882B2 | Snow removal machine | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7343994B2 | Working machine | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7143835B2 | Walk-behind electric working machine | Performing Operations; Transporting | 5 | Expired |
| US10517208B2 | Mower provided with center pivot axle | Human Necessities | 5 | Active |
| US6578934B2 | Snow removal machine | Fixed Constructions | 5 | Expired |
| US7305778B2 | Self-propelled working machine | Fixed Constructions | 4 | Expired |
| US10390482B2 | Power equipment with cylinder deactivation engine | Emerging Cross-Sectional Technologies | 1 | Active |
| US7267188B2 | Electric vehicle | Performing Operations; Transporting | 1 | Expired |
| US10442461B2 | Power equipment provided with center pivot axle | Performing Operations; Transporting | 1 | Active |
| US10306828B2 | Lawn mower powered by cylinder deactivation engine | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US10219437B2 | Power equipment with cylinder deactivation engine | Emerging Cross-Sectional Technologies | 1 | Active |
| US6968265B2 | Travel control method of electric vehicle | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.