David Clarke
26Patents
5h-index
46Co-inventors
69Inventor score
Filing activity: Nov 23, 1981 → Sep 17, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4481268A | Method of forming a photographic dye image | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4358527A | Photographic products employing nondiffusible metal-complexed azo dye-releasing compounds and precursors thereof | Physics | 12 | Expired |
| US5415981A | Photographic silver halide color materials | Physics | 12 | Expired |
| US5284739A | Photographic silver halide color material having incorporated therein a ballasted heterocyclic-sulphonhydrazide color developing agent | Physics | 5 | Expired |
| US9804091B2 | Assay test card | Emerging Cross-Sectional Technologies | 5 | Active |
| US6900006B2 | Photographic elements containing a de-aggregating compound, dye-forming coupler and stabilizer | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6841344B2 | Photographic elements containing a de-aggregating compound and dye-forming coupler | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6004738A | Photographic elements containing cyan dye-forming coupler, coupler solvent and bisphenol derivative | Physics | 4 | Expired |
| US9945816B2 | Ultrasonic NDT sensor arrangement and method for inspecting surfaces of variable geometry of metal bodies | Physics | 2 | Active |
| US6444412B1 | Photographic element with dye-forming coupler and stabilizing compound | Physics | 2 | Expired |
| US4426326A | Nondiffusible metal-complexed azo dye-releasing compounds | Physics | 1 | Expired |
| US7480049B2 | Circular dichroism detection system | Physics | 1 | Expired |
| US6756189B2 | Photographic elements containing cyan coupler UV absorber and stabilizer | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4942118A | Photographic silver halide materials and process comprising a pyrazoloazole coupler | Physics | 1 | Expired |
| US6410216B1 | Method of forming a photographic color image | Physics | 1 | Expired |
| US5723623A | Method of transforming pyrazole compounds | Chemistry; Metallurgy | 1 | Expired |
| US6444417B1 | Photographic element containing cyan dye-forming coupler | Physics | 1 | Expired |
| US6699650B1 | Photographic couplers having improved image dye light stability | Physics | 0 | Expired |
| US7648821B2 | Method of forming flexible electronic circuits | Emerging Cross-Sectional Technologies | 0 | Active |
| US4959480A | Photographic silver halide materials and process comprising a pyrazoloazole coupler | Physics | 0 | Expired |
| US9816924B2 | Assay device and methods | Emerging Cross-Sectional Technologies | 0 | Active |
| US7211441B2 | Lipoprotein assay | Emerging Cross-Sectional Technologies | 0 | Expired |
| US5374511A | Photographic color couplers and photographic materials containing them | Physics | 0 | Expired |
| US9964522B2 | Component inspection apparatus and method | Physics | 0 | Active |
| US11096621B2 | Detection of BRCA and other high risk carriers in breast tissue | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.