Alan E. Bell
33Patents
16h-index
19Co-inventors
78Inventor score
Filing activity: Mar 19, 1976 → Jul 17, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4958378A | Method and apparatus for detecting changes in raster data | Physics | 446 | Expired |
| US6832319B1 | Content guard system for copy protection of recordable media | Electricity | 90 | Expired |
| US4023185A | Ablative optical recording medium | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4101907A | Overcoat structure for optical video disc | Physics | 54 | Expired |
| US4669070A | Signal format for optical tape record/playback system | Physics | 41 | Expired |
| US4285056A | Replicable optical recording medium | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4794560A | Eraseable self biasing thermal magneto-optic medium | Physics | 34 | Expired |
| US4216501A | Optical anti-reflective information record | Physics | 34 | Expired |
| US4300143A | Thin protective overcoat layer for optical video disc | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4300227A | Replicable optical recording medium | Physics | 27 | Expired |
| US4425570A | Reversible recording medium and information record | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4222071A | Sensitivity information record | Physics | 25 | Expired |
| US4315269A | Thick protective overcoat layer for optical video disc | Physics | 22 | Expired |
| US4661941A | Optical video or data tape record and playback apparatus | Physics | 18 | Expired |
| US4195312A | Recorder and antireflective record blank having an optically passive transparent layer | Physics | 18 | Expired |
| US4126150A | Photovoltaic device having increased absorption efficiency | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4195313A | Antireflective information record having an optically passive transparent layer | Physics | 15 | Expired |
| US4270132A | Information record | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4329697A | Information record | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4387381A | Optical recording medium and information record with tracking aid | Physics | 10 | Expired |
| US4408213A | Reinforced bubble recording medium and information record | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7380137B2 | Content guard system for copy protection of recordable media | Physics | 9 | Expired |
| US4233626A | Playback information record using phase cancellation for reading | Physics | 9 | Expired |
| US7082413B2 | System and method for authorized compression of digitized music | Physics | 9 | Expired |
| US4189735A | Record playback apparatus and information record therefor | Emerging Cross-Sectional Technologies | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.