Koji Arakawa
25Patents
11h-index
17Co-inventors
72Inventor score
Filing activity: Apr 29, 1976 → Jan 24, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5436550A | AC-DC converter having saw-tooth wave generating circuit in active filter | Emerging Cross-Sectional Technologies | 55 | Expired |
| US5718549A | Releasable two-part fixing clip | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US5200492A | Polymer blends | Emerging Cross-Sectional Technologies | 42 | Expired |
| US8113253B2 | Non-pneumatic tire | Emerging Cross-Sectional Technologies | 39 | Active |
| US5111372A | DC-DC converter | Electricity | 34 | Expired |
| US5440473A | AC-DC converter | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4629962A | Battery charging device | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5457622A | AC-DC converter | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5489837A | AC-DC converter having improved power factor to control feedback signal corresponding to output voltage of constant control circuit | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5296830A | Choke coil | Electricity | 12 | Expired |
| USD949087S1 | Tire | General | 11 | Active |
| US5502628A | AC-DC converter | Emerging Cross-Sectional Technologies | 9 | Expired |
| USD931795S1 | Tire | General | 9 | Active |
| USD983124S1 | Tire | General | 3 | Active |
| US4045753A | Ceramic filter | Electricity | 3 | Expired |
| US5086381A | DC-DC converter | Electricity | 3 | Expired |
| US10890522B2 | Rubber friction test method | Physics | 1 | Active |
| US7068664B2 | Voice interception system for mobile switching system | Electricity | 1 | Expired |
| US8666831B2 | Power generation leveling system and power generation leveling method | Emerging Cross-Sectional Technologies | 1 | Active |
| US11505010B2 | Pneumatic tire | Performing Operations; Transporting | 0 | Active |
| US7382720B2 | Active/standby switching system and active/standby switching method | Electricity | 0 | Active |
| US10429273B2 | Device for measuring tire ground state | Performing Operations; Transporting | 0 | Active |
| US10718704B2 | Rubber adhesion test method and rubber adhesion test system | Physics | 0 | Active |
| US11002639B2 | Tire distortion detection method | Physics | 0 | Active |
| US11433716B2 | Pneumatic tire | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.