Graham Walker
9Patents
7h-index
5Co-inventors
56Inventor score
Filing activity: Jul 31, 1981 → Mar 1, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6698423B1 | Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator | Emerging Cross-Sectional Technologies | 131 | Expired |
| US5979440A | Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator | Emerging Cross-Sectional Technologies | 129 | Expired |
| US6681764B1 | Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator | Emerging Cross-Sectional Technologies | 101 | Expired |
| US6651653B1 | Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator | Emerging Cross-Sectional Technologies | 90 | Expired |
| US4420265A | Infrared temperature monitoring apparatus having means for sky radiation compensation | Physics | 33 | Expired |
| USRE43398E1 | Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator | General | 27 | Expired |
| US4631928A | Joule-Thomson apparatus with temperature sensitive annular expansion passageway | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6247234A | Razor and blade | Performing Operations; Transporting | 5 | Expired |
| US4738122A | Refrigerant expansion device with means for capturing condensed contaminants to prevent blockage | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.