Akira Matsui
131Patents
17h-index
134Co-inventors
89Inventor score
Filing activity: Dec 27, 1973 → Jan 17, 2025
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6578989B2 | Optical device for an optical element and apparatus employing the device | Emerging Cross-Sectional Technologies | 154 | Expired |
| US7085634B2 | Parking assist apparatus and parking assist method for vehicle | Performing Operations; Transporting | 56 | Expired |
| US7399108B2 | Light emitting source and a light emitting source array | Electricity | 56 | Active |
| US7039504B2 | Vehicle backward movement assist device and vehicle parking assist device | Performing Operations; Transporting | 39 | Expired |
| US7106357B2 | Portable information terminal device having camera feature | Electricity | 35 | Expired |
| US4783429A | No alkali containing biocompatible glass ceramic with apatite, wollastonite and diopside crystals mixed | Human Necessities | 33 | Expired |
| US4606255A | Guitar for guitar synthesizer | Physics | 32 | Expired |
| US3950451A | Hardenable epoxy resin composition | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6489550B1 | Musical apparatus detecting maximum values and/or peak values of reflected light beams to control musical functions | Physics | 24 | Expired |
| US7043346B2 | Parking assist apparatus and parking assist method for vehicle | Performing Operations; Transporting | 23 | Expired |
| US6993211B2 | Code reader | Physics | 22 | Expired |
| US7487020B2 | Driving assist apparatus and method for vehicle | Performing Operations; Transporting | 22 | Expired |
| US5562446A | Small handpiece with fluid driven turbine | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6364209B1 | Data reading apparatus | Physics | 21 | Expired |
| US5772436A | Odontotherapeutic hand piece | Human Necessities | 21 | Expired |
| US7734404B2 | Deceleration control apparatus for vehicle | Performing Operations; Transporting | 20 | Expired |
| US7075456B2 | Parking assist device | Performing Operations; Transporting | 19 | Expired |
| US7117073B2 | Parking-assist device and reversing-assist device | Performing Operations; Transporting | 16 | Expired |
| US5990409A | Musical apparatus detecting maximum values and/or peak values of reflected light beams to control musical functions | Physics | 15 | Expired |
| US7012550B2 | Parking assist apparatus and parking assist method for vehicle | Performing Operations; Transporting | 14 | Expired |
| US5034353A | Biocompatible glass ceramics | Human Necessities | 14 | Expired |
| US6175074A | Musical apparatus detecting maximum values and/or peak values of reflected light beams to control musical functions | Physics | 13 | Expired |
| US5981448A | Lubricating oil for rolling bearing in high-speed rotating equipment and bearing lubricated with the same lubricating oil | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US4674357A | Balancing device for press | Emerging Cross-Sectional Technologies | 12 | Expired |
| US7470042B2 | Luminescent light source and luminescent light source array | Mechanical Engineering; Lighting; Heating | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.