John Charlton
16Patents
9h-index
13Co-inventors
69Inventor score
Filing activity: Jun 19, 1973 → Dec 10, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4797970A | Foot-operated door security device | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5755582A | Retractable door stop security device/utility box | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4106907A | Centrifuge tube and method for performing assay with same | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6718989B1 | Filter for a cigarette and a filter-tipped cigarette | Human Necessities | 19 | Expired |
| US5662126A | Smoke filter containing particulate smoke modifying additive | Human Necessities | 18 | Expired |
| US5775746A | Retractable door stop security device/utility box | Emerging Cross-Sectional Technologies | 15 | Expired |
| US3933996A | Composition comprising radioactive labeled-fibrinogen and albumin | Human Necessities | 13 | Expired |
| US6080457A | Particulate sorbent smoke filter | Emerging Cross-Sectional Technologies | 13 | Expired |
| US3950643A | Automatic volume counting | Physics | 10 | Expired |
| US5787902A | Concentric core filter | Human Necessities | 8 | Expired |
| US4904308A | Adjustable smoker's mouthpiece | Human Necessities | 5 | Expired |
| US4133951A | Vitamin B-12 cobalt-57 and process | Physics | 5 | Expired |
| US6422244B1 | Filter for a cigarette and filter cigarette | Human Necessities | 4 | Expired |
| US4839299A | Assay for the free portion of substances in biological fluids | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6302114A | Tobacco smoke filter | Human Necessities | 3 | Expired |
| US8622122B2 | Rod reel and method of repairing a rod string | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.