Masahiro Oka
55Patents
7h-index
68Co-inventors
75Inventor score
Filing activity: Jan 10, 1990 → Nov 29, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5736262A | Magnetic recording medium | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5494722A | Magnetic recording medium and method for its production | Emerging Cross-Sectional Technologies | 20 | Expired |
| US9468280B2 | Lip cosmetic applicator device | Human Necessities | 10 | Active |
| US7249250B1 | Remote order acceptance design system and elevator remote order acceptance method | Physics | 10 | Expired |
| US10948208B2 | System and method for heating and cooling | Emerging Cross-Sectional Technologies | 9 | Active |
| US9303907B2 | Refrigerant charging device, refrigeration device and refrigerant charging method | Mechanical Engineering; Lighting; Heating | 8 | Active |
| US5567346A | Latent heat storage material composition | Chemistry; Metallurgy | 8 | Expired |
| US7359840B2 | Remote order acceptance design system and elevator remote order acceptance method | Physics | 7 | Active |
| US7360372B2 | Refrigeration system | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US8899056B2 | Air conditioner | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US5453213A | Latent heat storage material containing Na.sub.2 SO.sub.4.10H.sub.2 O, NH.sub.4 Cl, NaCl and (NH.sub.4).sub.2 SO.sub.4 | Chemistry; Metallurgy | 5 | Expired |
| US4972772A | Thermal transfer machine for belt markings | Performing Operations; Transporting | 4 | Expired |
| US7314833B2 | Method for manufacturing substrate for discrete track recording media and method for manufacturing discrete track recording media | Physics | 4 | Active |
| US8280557B2 | Air-conditioning apparatus | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US8297073B2 | Heat source unit and refrigeration system | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US7635529B2 | Substrate for magnetic recording media, magnetic recording media and magnetic recording apparatus | Physics | 3 | Active |
| US9851132B2 | Air conditioner | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US5829260A | Absorption cool-warm water machine and method for controlling the same | Emerging Cross-Sectional Technologies | 3 | Expired |
| US8116035B2 | Magnetic recording medium having a secondary recording layer made of a material having a negative crystal magnetic anisotropy and magnetic recording and reproducing apparatus | Electricity | 3 | Active |
| US10388524B2 | Film forming method, boron film, and film forming apparatus | Electricity | 2 | Active |
| US9958191B2 | Refrigeration apparatus | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7580223B2 | Magnetic recording media, substrate for magnetic recording media, and magnetic recording apparatus | Physics | 2 | Active |
| US7879466B2 | Perpendicular magnetic recording medium, and perpendicular magnetic recording and reproducing apparatus | Electricity | 2 | Active |
| US9398800B2 | Cosmetic application device | Human Necessities | 2 | Active |
| US9513040B2 | Electronic expansion valve, and air conditioner | Emerging Cross-Sectional Technologies | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.