Cowan; David E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Cowan; David E..The latest application filed is for "portable roadway warning device".
- Cowan; David E. - Orange Village OH
- Cowan; David E. - Cleveland OH
| Patent | Date |
|---|---|
| Portable Roadway Warning Device App 20140190395 - Cowan; David E. | 2014-07-10 |
| Barriers with kiss-offs Grant 7,922,420 - Christensen , et al. April 12, 2 | 2011-04-12 |
| Barriers With Kiss-offs App 20100034584 - Christensen; Marc E. ; et al. | 2010-02-11 |
| Barriers with interlocking sides Grant 7,588,387 - Christensen , et al. September 15, 2 | 2009-09-15 |
| Barrier with interlocking sides Grant D533,281 - Christensen , et al. December 5, 2 | 2006-12-05 |
| Portable sign assembly Grant 6,769,207 - Brown , et al. August 3, 2 | 2004-08-03 |
| Traffic channeling device Grant 6,182,600 - Brown , et al. February 6, 2 | 2001-02-06 |
| Traffic channelizer Grant D406,543 - Brown , et al. March 9, 1 | 1999-03-09 |
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