Gerard E. Van Rosmalen
59Patents
20h-index
33Co-inventors
88Inventor score
Filing activity: Apr 29, 1974 → Dec 4, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4864118A | Optical scanning unit with tracking error detection | Physics | 55 | Expired |
| US4425043A | Device for detecting the position of an object | Physics | 52 | Expired |
| US4063287A | Tracking mirror device for a video disc player | Physics | 47 | Expired |
| US4469945A | Device for detecting radiation and semiconductor device for use in such a device | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4514837A | Apparatus for optically reading and/or recording information | Physics | 45 | Expired |
| US4073567A | Pivoting mirror device | Physics | 44 | Expired |
| US4546463A | Apparatus for recording and reading information tracks on an optical record carrier with a beam of radiation | Physics | 43 | Expired |
| US4074312A | Automatic dithering optical focusing system using an oscillating mirror in the path of the radiation beam | Physics | 39 | Expired |
| US4561081A | Opto-electronic apparatus for inscribing and/or reading recording tracks by means of a radiation beam | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US4135206A | Objective mount for video disc player | Physics | 35 | Expired |
| US4882723A | Device for optically scanning a rotating disc | Physics | 33 | Expired |
| US4193091A | Optical videodisc read unit with tracking and focussing wobblers | Electricity | 33 | Expired |
| US4536864A | Apparatus for reading an optically coded disc-shaped record carrier | Physics | 29 | Expired |
| US4557564A | Movable scanning unit for an optical recording or playback apparatus | Physics | 28 | Expired |
| US6649093B2 | Method of manufacturing an optically scannable information carrier | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4638471A | Optical scanning unit comprising a translational-position and angular-position detection system for an electro-magnetically suspended objective | Physics | 26 | Expired |
| US3969575A | Opto-electronic focus detection system | Physics | 24 | Expired |
| US5171984A | Scanning device comprising a rotatable mirror, drive unit for use in the scanning device, using permanent magnetic rotor body and stationary stator section | Electricity | 23 | Expired |
| US4423496A | Apparatus for reading and/or writing an optically readable information structure | Physics | 23 | Expired |
| US4890905A | Replica lens and method of manufacturing same | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4032776A | Automatic optical focussing system | Physics | 20 | Expired |
| US5235583A | Optical scanning for record carriers adapted for reading with differing wavelengths | Physics | 18 | Expired |
| US4773055A | Videodisc focusing and tracking servo | Physics | 16 | Expired |
| US5789743A | Optical scanning device, and apparatus provided with such a device, employing scanning element having reflective measuring reference face | Physics | 16 | Expired |
| US5191221A | Optical device determining the position and orientation of an object, and optical recording and/or reproducing apparatus including the device | Physics | 15 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.