Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7569178 | Apparatus and method for in-situ calibration of vacuum gauge by absolute method and comparison method | Seung Soo Hong, Yong Hyeon Shin, Kwang Hwa Chung | 2009-08-04 |