Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11022296 | Operatory lights and replacement bulbs for operatory lights | Densen Cao | 2021-06-01 |
| 10690334 | Operatory lights and replacement bulbs for operatory lights | Densen Cao | 2020-06-23 |
| 8653723 | LED light bulbs for space lighting | Densen Cao | 2014-02-18 |
| 8220115 | Holder for handpiece devices | Jack Nichols, Douglas D. Beattie, Densen Cao | 2012-07-17 |
| 7602761 | Call access control method | Xuezhi Yang, Wenbo Wang | 2009-10-13 |
| 7283230 | Semiconductor forensic light kit | Calvin D. Ostler, Densen Cao, Hongyan Li | 2007-10-16 |
| 7267457 | Method for detecting forensic evidence | Calvin D. Ostler, Densen Cao, Hongyan Li | 2007-09-11 |
| 7252678 | Forensic light using semiconductor light source | Calvin D. Ostler, Densen Cao, Hongyan Li | 2007-08-07 |
| 6954270 | Method for detecting forensic evidence | Calvin D. Ostler, Densen Cao, Hongyan Li | 2005-10-11 |