Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D799597 | Pen | Hanqi Xu | 2017-10-10 |
| D777257 | Pen | Hanqi Xu | 2017-01-24 |
| D746923 | Pen | — | 2016-01-05 |
| D746376 | Pen | — | 2015-12-29 |
| 9048700 | Motor assembly with integrated cooling means and enclosed compartment for electronic circuitry | — | 2015-06-02 |
| 8912698 | Motor assembly with integrated cooling means and enclosed compartment for electronic circuitry | — | 2014-12-16 |
| D713882 | Pen | — | 2014-09-23 |
| D713878 | Pen | — | 2014-09-23 |
| D712480 | Pen | — | 2014-09-02 |
| D712479 | Pen and stylus | — | 2014-09-02 |
| D709950 | Pen | — | 2014-07-29 |
| D709951 | Pen | — | 2014-07-29 |
| D709949 | Pen and stylus | — | 2014-07-29 |
| D670761 | Pen | — | 2012-11-13 |
| D670762 | Pen | — | 2012-11-13 |
| D654359 | Mailing tray | — | 2012-02-21 |
| 7298078 | Flat, flexible fluorescent lamp | Gustaf T. Appelberg, Douglas A. George | 2007-11-20 |
| 6896388 | Path marking and lighting system | Douglas A. George, Gustaf T. Appelberg | 2005-05-24 |
| 6788000 | Distributed emergency lighting system having self-testing and diagnostic capabilities | Gustaf T. Appelberg | 2004-09-07 |
| 6304039 | Power supply for illuminating an electro-luminescent panel | Gustaf T. Appelberg, Jerrold Milks, Douglas A. George | 2001-10-16 |
| 6043609 | Control circuit and method for illuminating an electroluminescent panel | Douglas A. George, Gustaf T. Appelberg, David Ross | 2000-03-28 |
| 5192163 | Correction method for contaminated sites | — | 1993-03-09 |
| 4948297 | Correction method for contaminated sites | — | 1990-08-14 |
| 4301776 | Crankshaft apparatus | — | 1981-11-24 |
| 4220881 | Dual, three phase, inverter-driven motor | David C. Hamilton | 1980-09-02 |