Roberts Douglas H
USPTO Trademark & Patent Filings
Trademark applications and grants for Roberts Douglas H. Roberts Douglas H has 2 trademark applications. The latest application filed is for "RETROVALVE"
- Company Aliases
- Roberts, Douglas H.
- Roberts, Douglas, H
- h douglas roberts
- Roberts; Douglas H. - Bellevue WA
Trademarks Patents
| Patent Application | Date |
|---|---|
| Communication Method for Vacuum Tube Replacement Devices 20080260183 - 11/876720 Hertzberg; Brett A. ; et al. | 2008-10-23 |
| VACUUM TUBE REPLACEMENT DEVICE, CIRCUIT AND SYSTEM 20080204131 - 11/678562 Roberts; Douglas H. | 2008-08-28 |
| Expanded Performance and Functions for Vacuum Tube Replacement Devices 20070285156 - 11/836674 Roberts; Douglas H. ; et al. | 2007-12-13 |
| Indicators for vacuum tube replacement devices 20070035408 - 11/203077 Roberts; Douglas H. ; et al. | 2007-02-15 |
| Communication method for vacuum tube replacement devices 8,335,326 - 11/876,720 Hertzberg , et al. December 18, 2 | 2012-12-18 |
| Expanded performance and functions for vacuum tube replacement devices 7,482,863 - 11/836,674 Roberts , et al. January 27, 2 | 2009-01-27 |
| Vacuum tube replacement device, circuit and system 7,408,401 - 11/678,562 Roberts August 5, 2 | 2008-08-05 |
| Indicators for vacuum tube replacement devices 7,286,060 - 11/203,077 Roberts , et al. October 23, 2 | 2007-10-23 |
| Circuitry for dynamically controlling capacitor charge based on battery capacity 5,889,388 - United States Pate Cameron , et al. March 30, 1 | 1999-03-30 |
Mark Image Registration | Serial | Trademark Application Date |
|---|---|
"RETROVALVE" 78126294 |
RETROVALVE 2002-05-04 |
"JET-HOT" 2205521 75362594 |
JET-HOT 1997-09-25 |
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