Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9921109 | Polarization-characterizing methods using phase-shifting targets | Yuqiang Tu | 2018-03-20 |
| 9631979 | Phase-shift reticle for characterizing a beam | Yuqiang Tu | 2017-04-25 |
| 9207075 | Multi-angle levels and plumbing methods | David M. Lettkeman | 2015-12-08 |
| 8646186 | Multi-angle levels and plumbing methods | David M. Lettkeman | 2014-02-11 |