Toshiro Azuma
18Patents
12h-index
16Co-inventors
75Inventor score
Filing activity: Dec 27, 1976 → Jan 24, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5163293A | Axle driving apparatus with variable depth crescent oil passages | Performing Operations; Transporting | 77 | Expired |
| US5335496A | Axle driving apparatus | Mechanical Engineering; Lighting; Heating | 70 | Expired |
| US6189641A | Four-wheel hydraulic drive system for working vehicle | Performing Operations; Transporting | 63 | Expired |
| US4886142A | Hydraulic four-wheel drive system | Performing Operations; Transporting | 51 | Expired |
| US6196348A | Driving system for a working vehicle | Performing Operations; Transporting | 42 | Expired |
| US4882940A | Power transmission mechanism for tractor | Human Necessities | 21 | Expired |
| US6401854B2 | Driving system for a working vehicle | Performing Operations; Transporting | 20 | Expired |
| US5377487A | Axle driving apparatus having offset output shaft | Performing Operations; Transporting | 18 | Expired |
| US6668549B2 | Hydrostatic vehicle driving system applicable to a working vehicle | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US5590737A | Traveling transmission for a vehicle | Performing Operations; Transporting | 16 | Expired |
| US6481314B2 | Vehicle travelling control apparatus | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4664210A | Hydraulic steering system | Performing Operations; Transporting | 12 | Expired |
| US4148382A | Vehicle power transmission with brake | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5447028A | Axle driving apparatus | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4798259A | Front wheel speed-up mechanism for a four wheel drive vehicle when turning | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6860105B2 | Hydrostatic vehicle driving system applicable to a working vehicle | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5462148A | Vehicle multi-ratio transmission | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7086227B2 | Hydrostatic vehicle driving system applicable to a working vehicle | Mechanical Engineering; Lighting; Heating | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.