Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7716991 | Apparatus for measuring pressure using acoustic impedance variation | Bongyoung AHN, Seung Hyun CHO, Seung Soo Hong, Yong Hyeon Shin | 2010-05-18 |
| 7664618 | Trend monitoring and diagnostic analysis method and system for failure protection and for predictive maintenance of a vacuum pump | Wan Sup Cheung, Jong Yeon Lim, Soo Gab Lee | 2010-02-16 |
| 7653512 | Precision diagnostic method for the failure protection and predictive maintenance of a vacuum pump and a precision diagnostic system therefor | Wan Sup Cheung, Jong Yeon Lim, Soo Gab Lee | 2010-01-26 |
| 7569178 | Apparatus and method for in-situ calibration of vacuum gauge by absolute method and comparison method | Seung Soo Hong, Yong Hyeon Shin, In Tae Lim | 2009-08-04 |
| 7456633 | Apparatus for and method of measuring composition and pressure of the discharged gas from ion gauge using residual gas analyzer | Seung Soo Hong, Yong Hyeon Shin | 2008-11-25 |
| 7228742 | Pressure measuring system for vacuum chamber using ultrasonic wave | Seung Soo Hong, Yong Hyeon Shin | 2007-06-12 |
| 7061184 | Plasma electron density measuring and monitoring device | Jung Hyung Kim, Yong Hyeon Shin, Sang Choi | 2006-06-13 |
| 5899666 | Ion drag vacuum pump | Hong Young Jang | 1999-05-04 |