David A. Epstein
30Patents
12h-index
37Co-inventors
81Inventor score
Filing activity: Apr 19, 1989 → Jun 7, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6446083B1 | System and method for classifying media items | Emerging Cross-Sectional Technologies | 184 | Expired |
| US6578192B1 | Method and system for supporting dynamic document content expressed in a component-level language | Physics | 102 | Expired |
| US5402532A | Direct display of CSG expression by use of depth buffers | Physics | 71 | Expired |
| US6512670B1 | Detachable displays or portable devices | Electricity | 63 | Expired |
| US6578191B1 | Method and apparatus for dynamic generation of adapters | Physics | 58 | Expired |
| US6260042A | Quick difference and update for tree structure data | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5027292A | Multiple depth buffers for graphics and solid modelling | Physics | 27 | Expired |
| US8198084B2 | Serum-free mammalian cell culture medium, and uses thereof | Chemistry; Metallurgy | 19 | Expired |
| US5423040A | System and method for efficiently executing directed acyclic graphs | Physics | 17 | Expired |
| US6536033B1 | Uniform mechanism for building containment hierarchies | Physics | 15 | Expired |
| US6767741B1 | Metal binding compounds and their use in cell culture medium compositions | Chemistry; Metallurgy | 13 | Expired |
| US5347652A | Method and apparatus for saving and retrieving functional results | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5787535A | Chain saw multi-tool | Performing Operations; Transporting | 10 | Expired |
| USD890844S1 | Pen | General | 4 | Active |
| US6408299B1 | Type convertor registry | Emerging Cross-Sectional Technologies | 4 | Expired |
| USD925653S1 | Pen | General | 4 | Active |
| US8455246B2 | Serum-free mammalian cell culture medium, and uses thereof | Chemistry; Metallurgy | 3 | Active |
| USD919006S1 | Pen | General | 3 | Active |
| US9426949B1 | Systems and apparatus for extracting and delivering nutrients from biomass for plant growth | Emerging Cross-Sectional Technologies | 3 | Active |
| US8785194B2 | Serum-free mammalian cell culture medium, and uses thereof | Chemistry; Metallurgy | 2 | Active |
| US8815573B2 | Serum-free mammalian cell culture medium, and uses thereof | Chemistry; Metallurgy | 2 | Active |
| USD925654S1 | Pen | General | 2 | Active |
| USD923091S1 | Pen | General | 2 | Active |
| USD954146S1 | Pen | General | 1 | Active |
| US9760914B2 | Determining cost and processing of sensed data | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.