Jun Akiyama
48Patents
10h-index
58Co-inventors
78Inventor score
Filing activity: Aug 30, 1982 → Jul 24, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5343452A | Data recording/reproducing apparatus of simultaneously performing both reproducing and recording from and in a single recording medium | Physics | 45 | Expired |
| US5315571A | Information recording and reproducing device providing faster access time to a recording medium | Physics | 31 | Expired |
| US6065094A | Inexpensive compressed data storage apparatus with improved resistance to vibrations | Physics | 30 | Expired |
| US5457667A | Data recording/reproducing apparatus with alternating access of compressed works | Physics | 26 | Expired |
| US4735526A | Method for installing offshore jack-up structures | Fixed Constructions | 24 | Expired |
| US5764607A | Method and apparatus for controlling digital copying of digitally recorded information | Physics | 20 | Expired |
| US5594992A | Apparatus for measuring a lens frame configuration | Performing Operations; Transporting | 19 | Expired |
| US4527087A | Fluorescent lamp | Electricity | 18 | Expired |
| US5895314A | Lens shape measuring apparatus | Performing Operations; Transporting | 15 | Expired |
| US6392970B1 | Reproducing light quantity control method for optical memory device, and reproducing light quantity control device, and optical recording medium | Physics | 11 | Expired |
| US5555229A | Method and arrangement for recording/reproducing compressed program information on a recording medium containing a plurality of programs | Physics | 10 | Expired |
| US6019669A | Lens shape measuring apparatus | Performing Operations; Transporting | 7 | Expired |
| US5500839A | Multiple coil magnetic head for magnetic optical recording device | Physics | 6 | Expired |
| US7080313B2 | Signal evaluation apparatus and signal evaluation method | Electricity | 6 | Expired |
| US8883926B2 | Acrylic pressure-sensitive adhesive composition for optical use and acrylic pressure-sensitive adhesive tape for optical use | Chemistry; Metallurgy | 4 | Active |
| US9902645B2 | Non-alkali glass | Physics | 3 | Active |
| US8710139B2 | Acrylic pressure-sensitive adhesive composition, acrylic pressure-sensitive adhesive layer, and acrylic pressure-sensitive adhesive tape | Emerging Cross-Sectional Technologies | 3 | Active |
| US7206351B2 | Signal evaluation devices and signal evaluation methods, signal quality evaluation methods and reproducing devices and recording devices | Electricity | 3 | Expired |
| US7564756B2 | Reproduction device and method wherein detection of sub-data generated within a controlled time period controls appropriate decryption | Physics | 3 | Active |
| US5984763A | Lens shape measuring apparatus | Performing Operations; Transporting | 3 | Expired |
| US7126894B2 | Optical disk apparatus and method for adjusting optical disk apparatus laser power | Physics | 2 | Expired |
| US8470724B2 | Transparent polycrystalline material and production process for the same | Electricity | 2 | Active |
| US6909677B1 | Optical disk, optical reproduction device, and optical recording device | Physics | 2 | Expired |
| US11472161B2 | Glass sheet composite | Electricity | 1 | Active |
| US9791162B2 | Household electrical appliance and household electrical system | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.