John Vala
41Patents
10h-index
15Co-inventors
68Inventor score
Filing activity: Jan 16, 1984 → Dec 13, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5063599A | Electronic image lift | Physics | 120 | Expired |
| US5557451A | Document processing with infra-red extraction | Physics | 30 | Expired |
| US5453849A | Integrating cylinder for object illumination | Physics | 23 | Expired |
| US4676646A | Method and apparatus for controlling thickness of a layer of an optical data storage device by measuring an optical property of the layer | Physics | 20 | Expired |
| US5313070A | Check imaging illumination with focus/defocus and fibre optic light guide means | Physics | 20 | Expired |
| US5426530A | Extraction and trapping of IR | Physics | 20 | Expired |
| US5825945A | Document imaging with illumination from lambertian surfaces | Physics | 13 | Expired |
| US5519513A | Techniques for illuminating objects | Physics | 12 | Expired |
| US6744469B1 | Illumination compensation using built-in reference | Electricity | 12 | Expired |
| US5155776A | Filtering illumination for image lift | Physics | 11 | Expired |
| US4622654A | Liquid crystal light valve with memory | Physics | 10 | Expired |
| US5063461A | Packaging of components for image lift | Physics | 9 | Expired |
| US5367386A | Image scanning apparatus adapted for thermally and optically isolating imaging components | Physics | 6 | Expired |
| US5089713A | Document-imaging illumination arrangements with intensity with adjustment | Physics | 6 | Expired |
| US5146362A | Infra-red extraction from illumination source | Physics | 5 | Expired |
| US5144457A | Integrated imaging assembly | Physics | 5 | Expired |
| US5003189A | Document-imaging illumination with fibre-optic intensity-adjust | Physics | 5 | Expired |
| US5780841A | Document-image camera mounted on reversible clamp | Electricity | 4 | Expired |
| US4993802A | Randomizing optical converter for illumination beam and method utilizing same | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5272331A | Document imaging camera with lamp bent into symmetrical lamp segments | Electricity | 4 | Expired |
| US5255107A | Integrated multi-beam imaging assembly | Physics | 4 | Expired |
| US5491336A | Document illumination with Lambertian cavity | Electricity | 3 | Expired |
| US5371356A | Document imaging with `doubly-bent` lamps | Electricity | 3 | Expired |
| US5259043A | Filtering illumination for image lift | Physics | 3 | Expired |
| US5471048A | Document imaging lamps with bent dark ends | Electricity | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.