Walker; David K.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Walker; David K..The latest application filed is for "ultra rapid cycle portable oxygen concentrator".
- Walker; David K. - Waynesburg PA
- Walker; David K. - Colrain MA
- Walker; David K. - Northfield MA
- Walker; David K. - Greenfield MA
- Walker; David K. - Victoria British Columbia CA
| Patent | Date |
|---|---|
| Ultra rapid cycle portable oxygen concentrator Grant 11,369,768 - Galbraith , et al. June 28, 2 | 2022-06-28 |
| Ultra rapid cycle portable oxygen concentrator Grant 11,278,697 - Galbraith , et al. March 22, 2 | 2022-03-22 |
| Ultra Rapid Cycle Portable Oxygen Concentrator App 20200139069 - Galbraith; Stephen Douglas ; et al. | 2020-05-07 |
| Ultra Rapid Cycle Portable Oxygen Concentrator App 20200069903 - GALBRAITH; Stephen Douglas ; et al. | 2020-03-05 |
| Portable oxygen enrichment device and method of use Grant 9,993,765 - Galbraith , et al. June 12, 2 | 2018-06-12 |
| Portable Oxygen Enrichment Device And Method Of Use App 20170021302 - GALBRAITH; STEPHEN DOUGLAS ; et al. | 2017-01-26 |
| Portable oxygen enrichment device and method of use Grant 9,492,781 - Galbraith , et al. November 15, 2 | 2016-11-15 |
| Ultra rapid cycle portable oxygen concentrator Grant 9,199,055 - Galbraith , et al. December 1, 2 | 2015-12-01 |
| Electronic E-Cylinder App 20150238721 - Rumph; Bradley D. ; et al. | 2015-08-27 |
| Ultra Rapid Cycle Portable Oxygen Concentrator App 20150101603 - Galbraith; Stephen Douglas ; et al. | 2015-04-16 |
| Portable Oxygen Enrichment Device and Method of Use App 20150104524 - Galbraith; Stephen Douglas ; et al. | 2015-04-16 |
| Ultra rapid cycle portable oxygen concentrator Grant 8,894,751 - Galbraith , et al. November 25, 2 | 2014-11-25 |
| Portable oxygen enrichment device and method of use Grant 8,888,902 - Galbraith , et al. November 18, 2 | 2014-11-18 |
| Portable Oxygen Enrichment Device and Method of Use App 20130216627 - Galbraith; Stephen Douglas ; et al. | 2013-08-22 |
| Ultra Rapid Cycle Portable Oxygen Concentrator App 20120192864 - Galbraith; Stephen Douglas ; et al. | 2012-08-02 |
| Contraband detection system Grant 5,227,800 - Huguenin , et al. * July 13, 1 | 1993-07-13 |
| Millimeter wave imaging sensors, sources and systems Grant 5,202,692 - Huguenin , et al. * April 13, 1 | 1993-04-13 |
| Fabrication of gunn diode semiconductor devices Grant 5,145,809 - Walker September 8, 1 | 1992-09-08 |
| Contraband detection system Grant 5,073,782 - Huguenin , et al. * December 17, 1 | 1991-12-17 |
| Micrometer wave imaging device Grant 4,910,523 - Huguenin , et al. March 20, 1 | 1990-03-20 |
| Object detection and location system Grant 4,901,084 - Huguenin , et al. February 13, 1 | 1990-02-13 |
| Bubble heart valve Grant 4,759,759 - Walker , et al. July 26, 1 | 1988-07-26 |
| Catenary mitral valve replacement Grant 4,340,977 - Brownlee , et al. July 27, 1 | 1982-07-27 |
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