David J Alexander
Inventor
Stats
- 2 US patents issued
- 2 US Applications filed
- most recent filing
This is official USPTO record data
Details
- 2 US Patents Issued
- 2 US Applications Filed
- 13 Total Citation Count
- Jun 8, 2012 Most Recent Filing
- Aug 20, 1992 Earliest Filing
Work History
| Patent Owner | Applications Filed | Year |
|---|---|---|
| Martin Marietta Energy Systems, Inc. | 1
| 1992
|
| VETCO GRAY UK LIMITED | 2
| 2012
|
| Vetco Gray U.K. Limited | 1
| 2012
|
Inventor Addresses
| Address | Duration |
|---|---|
| Aberdeen, GB | Dec 12, 13 - Apr 12, 16 |
| Oak Ridge, TN | Jan 04, 94 - Jan 04, 94 |
Technology Profile
| Technology | Matters | |
|---|---|---|
| E21B: | EARTH OR ROCK DRILLING | 1 |
| F16K: | VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING | 1 |
| G01N: | INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES | 1 |
Patents / Publication
| Patents / Publication # | Year of Publication / Issued | Title | Citations |
|---|---|---|---|
| 9309737 | 2016 | Rotational shear valve | 0 |
| 2013/0327,536 | 2013 | ROTATIONAL SHEAR VALVE | 6 |
| 5275057 | 1994 | Clip gage attachment for frictionless measurement of displacement during high-temperature mechanical testing | 7 |
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