Wataru Kubo
54Patents
6h-index
49Co-inventors
72Inventor score
Filing activity: Dec 26, 1989 → Jun 30, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5684762A | Opto-magnetic head apparatus | Physics | 31 | Expired |
| US4956833A | Objective driving device for an optical disk apparatus | Physics | 22 | Expired |
| US6829105B2 | Objective optical system for optical pick-up | Physics | 13 | Expired |
| US5600494A | Objective lens system of an optical disk device | Physics | 9 | Expired |
| US5850380A | Photomagnetic head apparatus | Physics | 8 | Expired |
| US6667943B1 | Optical disc apparatus | Physics | 7 | Expired |
| US6567353B1 | Optical head with light receiving element surfaces divided into at least three light receiving areas | Physics | 6 | Expired |
| US9378402B2 | Optical information reader and illuminating method | Physics | 5 | Active |
| US9798213B2 | Electrochromic element, method of driving the same, an optical filter, lens unit, image pick-up device and window material | Physics | 5 | Active |
| US6529465B2 | Optical system for optical disk drive | Physics | 5 | Expired |
| US9766527B2 | Electrochromic element, optical filter, lens unit, image pickup apparatus, and window member | Physics | 5 | Active |
| US6404485B1 | Rotation amount detecting system of deflection mirror for optical disc drive | Physics | 3 | Expired |
| US8971496B2 | X-ray waveguide | Physics | 3 | Active |
| US7816025B2 | Enzyme electrode, enzyme electrode producing method, sensor and fuel cell each using enzyme electrode | Emerging Cross-Sectional Technologies | 3 | Active |
| US10444588B2 | Electrochromic element, optical filter, lens unit, imaging apparatus, and window member | Physics | 3 | Active |
| US9869919B2 | Electrochromic element, optical filter, lens unit, image pickup apparatus, and window member | Physics | 3 | Active |
| US8958531B2 | X-ray waveguide | Performing Operations; Transporting | 2 | Active |
| US8611503B2 | X-ray waveguide | Physics | 2 | Active |
| US10208244B2 | Organic compound, electrochromic element containing the same, optical filter, lens unit, imaging device, and window material | Fixed Constructions | 2 | Active |
| US10372005B2 | Organic electrochromic device, optical filter, lens unit, and imaging apparatus | Physics | 2 | Active |
| US10151958B2 | Electrochromic element | Physics | 2 | Active |
| US7632600B2 | Enzyme electrode and method of producing the same | Emerging Cross-Sectional Technologies | 2 | Active |
| US8559600B2 | X-ray waveguide | Physics | 2 | Active |
| US7687186B2 | Enzyme electrode, and sensor and biofuel cell using the same | Emerging Cross-Sectional Technologies | 1 | Active |
| US7342865B2 | Objective lens for optical recording/reproducing device | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.