A. David Johnson
34Patents
20h-index
21Co-inventors
85Inventor score
Filing activity: Feb 23, 1977 → Jan 20, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5325880A | Shape memory alloy film actuated microvalve | Emerging Cross-Sectional Technologies | 235 | Expired |
| US5771742A | Release device for retaining pin | Emerging Cross-Sectional Technologies | 215 | Expired |
| US6746890B2 | Three dimensional thin film devices and methods of fabrication | Human Necessities | 192 | Expired |
| US5619177A | Shape memory alloy microactuator having an electrostatic force and heating means | Electricity | 187 | Expired |
| US6533905B2 | Method for sputtering tini shape-memory alloys | Human Necessities | 138 | Expired |
| US6669795B2 | Methods of fabricating high transition temperature SMA, and SMA materials made by the methods | Chemistry; Metallurgy | 75 | Expired |
| US5903099A | Fabrication system, method and apparatus for microelectromechanical devices | Electricity | 65 | Expired |
| US6742761B2 | Miniature latching valve | Performing Operations; Transporting | 65 | Expired |
| US6624730B2 | Thin film shape memory alloy actuated microrelay | Electricity | 59 | Expired |
| US6790298B2 | Method of fabrication of free standing shape memory alloy thin film | Human Necessities | 58 | Expired |
| US6614570B2 | Shutter for fiber optic systems | Physics | 55 | Expired |
| US6620634B2 | Method of accurately measuring compositions of thin film shape memory alloys | Physics | 54 | Expired |
| US6729599B2 | Liquid microvalve | Mechanical Engineering; Lighting; Heating | 52 | Expired |
| US5960812A | Fluid flow control valve | Emerging Cross-Sectional Technologies | 52 | Expired |
| US6470108B1 | Optical switching device and method | Physics | 48 | Expired |
| US6955187B1 | Zinc-air battery control valve | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4962625A | Container packing machines | Performing Operations; Transporting | 29 | Expired |
| US7422403B1 | Non-explosive releasable coupling device | Emerging Cross-Sectional Technologies | 27 | Expired |
| US7040323B1 | Thin film intrauterine device | Human Necessities | 26 | Expired |
| US4163414A | Method of erecting flat folded cases | Performing Operations; Transporting | 23 | Expired |
| US7441888B1 | Eyeglass frame | Performing Operations; Transporting | 18 | Active |
| US7632361B2 | Single crystal shape memory alloy devices and methods | Emerging Cross-Sectional Technologies | 17 | Expired |
| US7544257B2 | Single crystal shape memory alloy devices and methods | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4273322A | Gate mechanism for carton erecting machine | Performing Operations; Transporting | 16 | Expired |
| US4829747A | Method for opening and inserting multi-cell partitions | Performing Operations; Transporting | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.