Hal J. Rosen
55Patents
22h-index
51Co-inventors
91Inventor score
Filing activity: Oct 25, 1988 → May 25, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5202875A | Multiple data surface optical data storage system | Physics | 118 | Expired |
| US6280813A | Magnetic recording media with antiferromagnetically coupled ferromagnetic films as the recording layer | Physics | 109 | Expired |
| US5255262A | Multiple data surface optical data storage system with transmissive data surfaces | Emerging Cross-Sectional Technologies | 96 | Expired |
| US4873430A | Method and apparatus for optically measuring characteristics of a thin film by directing a P-polarized beam through an integrating sphere at the brewster's angle of the film | Physics | 76 | Expired |
| US5373499A | Multilayer optical disk and system having multiple optical paths include identical total disk substrate thickness | Physics | 54 | Expired |
| US6686579B2 | Digital pen using speckle tracking | Physics | 54 | Expired |
| US5381401A | Multiple data surface optical data storage system | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5499231A | Optical disk drive with multiple data layer disk and system for focusing the optical beam | Physics | 46 | Expired |
| US5555537A | Optical data storage system with multiple write-once phase-change recording layers | Physics | 39 | Expired |
| US5625609A | Multiple data layer optical disk drive system with fixed aberration correction and optimum interlayer spacing | Physics | 39 | Expired |
| US6624884B1 | Surface inspection tool | Physics | 34 | Expired |
| US6372330B1 | Laminated magnetic recording media with antiferromagnetically coupled layers as the individual magnetic layers in the laminate | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5446723A | Multiple data surface optical data storage system | Emerging Cross-Sectional Technologies | 29 | Expired |
| US8208228B2 | Current-perpendicular-to-the-plane (CPP) magnetoresistive read head with multiple sensing elements for patterned-media | Physics | 27 | Active |
| US8270256B1 | Magnetic recording disk drive with shingled writing and wide-area thermal assistance | Physics | 27 | Active |
| US5627817A | Optical disk data storage system with multiple write-once dye-based data layers | Physics | 26 | Expired |
| US5449590A | Multiple data surface optical data storage system | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5606546A | Optical data storage medium with multiple writable data layers separated by dieletric layers | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6704435B1 | Surface inspection tool | Physics | 25 | Expired |
| US7986491B2 | Hard disk drive with disk separator for creating axial gaps between disks for access by read/write heads | Physics | 24 | Active |
| US5986761A | Laser-based inspection tool for disk defects and curvature | Physics | 24 | Expired |
| US5615186A | Multiple data surface data storage system with holographic filter element | Physics | 23 | Expired |
| US5933230A | Surface inspection tool | Physics | 21 | Expired |
| US5487060A | Multiple data surface data storage system and method | Physics | 19 | Expired |
| US8416646B2 | Magnetic recording disk drive with shingled writing and rectangular optical waveguide for wide-area thermal assistance | Physics | 17 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.