David J. Williams
19Patents
7h-index
19Co-inventors
63Inventor score
Filing activity: Dec 27, 1972 → Nov 10, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4271281A | Process for preparing styrenic polymer particles | Chemistry; Metallurgy | 44 | Expired |
| US5651652A | Breakaway tamperproof fastener | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4342647A | Treatment of scrap | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7934297B2 | Twist off tamper-proof fastener | Emerging Cross-Sectional Technologies | 20 | Active |
| US5303578A | Rheometer | Physics | 20 | Expired |
| US4072519A | Photoconductive composition, and element | Chemistry; Metallurgy | 14 | Expired |
| US4047945A | Xeroprinting master and process | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4405733A | Composite quasi-crystalline material | Physics | 7 | Expired |
| US4006017A | Photoconductive composition, article and process | Chemistry; Metallurgy | 5 | Expired |
| US4517101A | Reduced biodegradability in a polymer flood process | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4033769A | Persistent photoconductive compositions | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4461897A | Process for the production of sulfenamides | Chemistry; Metallurgy | 4 | Expired |
| US4046563A | Photoconductive composition containing a tricyanopyrene, article and process of use | Chemistry; Metallurgy | 3 | Expired |
| US3961954A | Acid sensitized charge transfer complexes and cyclic electrostatographic imaging | Emerging Cross-Sectional Technologies | 2 | Expired |
| US3954906A | Ambipolar photoconductive composition | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4122114A | 1-Tricyanoinylpyrene | Chemistry; Metallurgy | 1 | Expired |
| US10315332B2 | Coloration of acetylated wood | Performing Operations; Transporting | 0 | Active |
| US10293515B2 | Coloration of acetylated wood | Chemistry; Metallurgy | 0 | Active |
| US7337173B1 | Compiler having global element optimization | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.