Issued Patents All Time
Showing 51–69 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6917196 | Method and apparatus generating and detecting torsional wave inspection of pipes or tubes | Hegeon Kwun, James F. Crane, Myoung-Seon Choi | 2005-07-12 |
| 6888412 | Phase locked loop circuit for reducing electromagnetic interference and control method thereof | Pil-Jae Jun | 2005-05-03 |
| 6856108 | Switched reluctance motor and initial activating method thereof | Yo Han LEE, Jun Young Lim, Yong Won Choi | 2005-02-15 |
| 6815948 | Method of detecting tension wire break in concrete pole | Hegeon Kwun, Kyoichi Asano | 2004-11-09 |
| 6806666 | Single-phase motor | Yo Han LEE, Jun Yong Lim, Yong Won Choi | 2004-10-19 |
| 6646408 | Method for controlling operating of switched reluctance motor (SRM) | Jun Young Lim | 2003-11-11 |
| 6638638 | Hollow solder structure having improved reliability and method of manufacturing same | Ho-Jeong Moon, Dong-Kil Shin, Seung-Kon Mok | 2003-10-28 |
| 6624628 | Method and apparatus generating and detecting torsional waves for long range inspection of pipes and tubes | Hegeon Kwun, Alfred E. Crouch | 2003-09-23 |
| 6603360 | Phase locked loop circuit for a fractional-N frequency synthesizer | Pil-Jae Jun | 2003-08-05 |
| 6586897 | Method of controlling alignment of a rotator of SRM and SRM driving circuit for realizing the same | Jun Young Lim | 2003-07-01 |
| 6559617 | Method for reducing torque ripple of switched reluctance motor | — | 2003-05-06 |
| 6429650 | Method and apparatus generating and detecting torsional wave inspection of pipes or tubes | Hegeon Kwun, James F. Crane | 2002-08-06 |
| 6404189 | Method and apparatus for inspecting pipelines from an in-line inspection vehicle using magnetostrictive probes | Hegeon Kwun | 2002-06-11 |
| 6396262 | Method and apparatus for short term inspection or long term structural health monitoring | Glenn M. Light, Hegeon Kwun, Robert L. Spinks, Jr. | 2002-05-28 |
| 6392286 | Semiconductor chip packaging system and a semiconductor chip packaging method using the same | Ho Jin, Heui Seong Kim | 2002-05-21 |
| 6373245 | Method for inspecting electric resistance welds using magnetostrictive sensors | Hegeon Kwun | 2002-04-16 |
| 5853521 | Multi-cathode electron beam plasma etcher | Kie Hyung Chung, Kil-ju Yun, Tae-Young Kim | 1998-12-29 |
| 5683938 | Method for filling contact holes with metal by two-step deposition | Yung Wook Song, Hun Kim | 1997-11-04 |
| 5140476 | Apparatus and method for tracing a track center of a magnetic disc | — | 1992-08-18 |