David E. Penna
23Patents
12h-index
22Co-inventors
81Inventor score
Filing activity: Jul 29, 1975 → Dec 3, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4712191A | Display system with nested information display | Physics | 126 | Expired |
| US7619560B2 | GPS processing arrangement | Physics | 77 | Active |
| US4779080A | Electronic information display systems | Physics | 70 | Expired |
| US4649380A | Video display system comprising an index store for storing reduced versions of pictures to be displayed | Physics | 55 | Expired |
| US4992780A | Method and apparatus for storing a two-dimensional image representing a three-dimensional scene | Physics | 43 | Expired |
| US6842124B2 | Variable length decoder | Electricity | 41 | Expired |
| US5991443A | Graphics image manipulation | Electricity | 30 | Expired |
| US6574364B1 | Pixel color value encoding and decoding | Electricity | 29 | Expired |
| US6243488A | Method and apparatus for rendering a two dimensional image from three dimensional image data | Physics | 26 | Expired |
| US5905503A | Rendering an image using lookup tables giving illumination values for each light source by direction and distance | Physics | 22 | Expired |
| US8068545B2 | Method and apparatus for processing image data | Electricity | 17 | Active |
| US4023124A | Acoustic surface wave devices | Electricity | 12 | Expired |
| US6498606B1 | Z-buffering graphics system | Physics | 11 | Expired |
| US6301389A | Video image color encoding | Electricity | 11 | Expired |
| US5784064A | Image processing | Human Necessities | 11 | Expired |
| US5838332A | Graphic image rendering | Physics | 8 | Expired |
| US5828381A | Variable display rate image coding | Electricity | 6 | Expired |
| US5317684A | Method of storing character data in a display device | Physics | 6 | Expired |
| US6222556A | Fast processing of image primitives | Physics | 6 | Expired |
| US8035617B2 | Portable computer device | Physics | 5 | Active |
| US5867143A | Digital image coding | Electricity | 3 | Expired |
| US8717236B2 | Position signal sampling method and apparatus | Physics | 2 | Active |
| US8897710B2 | Terminal | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.