Junji Hirokane
118Patents
17h-index
24Co-inventors
86Inventor score
Filing activity: May 3, 1984 → Mar 31, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4544443A | Method for manufacturing an optical memory element | Physics | 53 | Expired |
| US5428585A | Magneto-optical recording medium comprising first, second and third magnetic layers and method of recording on same | Physics | 39 | Expired |
| US5659537A | Magneto-optical recording medium and method of reproducing from same | Physics | 37 | Expired |
| US7180849B2 | Optical storage medium enabling uniform light transmittance, optical read/write apparatus for same, and optical read/write method for same | Physics | 36 | Expired |
| US7609605B2 | Optical storage medium, optical read/write apparatus, and optical read/write method | Physics | 35 | Active |
| US7586824B2 | Optical storage medium, optical read/write apparatus, and optical read/write method | Physics | 34 | Active |
| US5933411A | Optical recording medium having a wobbling section for recording address information and methods of recording and reproduction using same | Physics | 33 | Expired |
| US5644566A | Magneto-optical recording medium | Physics | 31 | Expired |
| US4610912A | Magneto-optic memory element | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5128922A | Optical disk with glass substrate and method of producing same | Physics | 24 | Expired |
| US5640374A | Magneto-optical recording medium having intermediate layer of in-plane magnetization and method of reproducing from the medium | Physics | 22 | Expired |
| US4917751A | Method of producing double sided optical memory disks | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5079113A | Photo-mask | Physics | 20 | Expired |
| US4778747A | Method of manufacturing optical memory element | Emerging Cross-Sectional Technologies | 19 | Expired |
| US6295271A | Optical recording medium having tracks, each track having a plurality of wobble sections/one-side wobble regions | Physics | 19 | Expired |
| US5087535A | Method of manufacturing photo-mask and photo-mask manufactured thereby | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5939187A | Magneto-optical recording medium | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5673250A | Optical recording medium having pit rows on every other boundary and reproducing method thereof | Physics | 16 | Expired |
| US5982715A | Magneto-optical recording medium having a signal reproducing region of the reproducing layer larger than the record bit in the recording layer | Physics | 16 | Expired |
| US4717628A | Magnetooptical storage element | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6122233A | Optical disk having virtually constant width recording track and optical disk apparatus | Physics | 16 | Expired |
| US5656385A | Magnetic recording medium and information recording-reproduction method using the same | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5648162A | Magneto-optical recording medium and a method of recording and/or reproducing using the same | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6430115B1 | Magneto-optical recording device with three distinct layers | Physics | 15 | Expired |
| US5633838A | Magneto-optical recording medium having two reproduction layers and a method for reproducing thereof | Physics | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.