John Davies
36Patents
18h-index
27Co-inventors
81Inventor score
Filing activity: Aug 23, 1977 → May 3, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5608387A | Personal identification devices and access control systems | Physics | 107 | Expired |
| US6375697B2 | Apparatus and method for screening people and articles to detect and/or to decontaminate with respect to certain substances | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5859375A | Apparatus for and method of collecting trace samples for analysis | Physics | 61 | Expired |
| US4168549A | Seat for use with a bathing device | Human Necessities | 61 | Expired |
| US5741984A | Method and apparatus for sample collection by a token | Physics | 48 | Expired |
| US5405781A | Ion mobility spectrometer apparatus and method, incorporating air drying | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5425263A | Method for inspecting an article for concealed substances | Physics | 35 | Expired |
| US6446514B1 | Combined particle/vapor sampler | Physics | 34 | Expired |
| US4452057A | Shoe machine | Human Necessities | 28 | Expired |
| US5434897A | Hydride damage resistant fuel elements | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5069221A | Displacement sensor and medical apparatus | Human Necessities | 26 | Expired |
| US5552600A | Pressure stabilized ion mobility spectrometer | Physics | 24 | Expired |
| US6790249B2 | Apparatus and method for screening people and articles to detect and/or decontaminate with respect to certain substances | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4406012A | Nuclear fuel elements having a composite cladding | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4390497A | Thermal-mechanical treatment of composite nuclear fuel element cladding | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6627444B1 | Method and solid phase calibration sample for calibration of analytical instructions | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4942016A | Nuclear fuel element | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5988002A | Method of collecting trace samples for analysis | Physics | 20 | Expired |
| US4869867A | Nuclear fuel | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6224760A | Chromatography column end arrangements | Physics | 15 | Expired |
| US6619143B2 | Combined particle vapor sampler | Physics | 15 | Expired |
| US4869866A | Nuclear fuel | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4951338A | Machine for performing a progressive operation on marginal portions of a shoe in the manufacture thereof | Performing Operations; Transporting | 14 | Expired |
| US4977490A | Fluorescent light fitting and system | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4126020A | Low inertia shoe machine tool support | Human Necessities | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.