Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10361573 | Battery pack | Hyun-Jun Do, Hwa-Su Kim, Cheol-Gi Son, Dong-Rak Kim, In-Seob Song +4 more | 2019-07-23 |
| 8467199 | Two-stage insulated bidirectional DC/DC power converter using a constant duty ratio LLC resonant converter | Jun-Young Lee, Yu-Seok Jeong, Hyung Jun CHAE, Jae Jin CHANG, Jae-Ha Chang | 2013-06-18 |
| 7591343 | Apparatuses for generating acoustic waves | Wei Han, Robert Birchak, William Trainor, Thomas Ritter, Diederik van Batenburg +1 more | 2009-09-22 |
| 7216738 | Acoustic stimulation method with axial driver actuating moment arms on tines | James R. Birchak, Thomas Ritter, Ali Mese, Diederik van Batenburg, William Trainor +7 more | 2007-05-15 |
| 7213681 | Acoustic stimulation tool with axial driver actuating moment arms on tines | James R. Birchak, Thomas Ritter, Ali Mese, Diederik van Batenburg, William Trainor +7 more | 2007-05-08 |
| 7095223 | Method of locating an anomaly in a tubular member in a well | — | 2006-08-22 |
| 6815946 | Magnetically activated well tool | — | 2004-11-09 |
| 6411084 | Magnetically activated well tool | — | 2002-06-25 |
| 6367366 | Sensor assembly | Duane Bloom, James W. Estep, Rudolph Ernst Krueger, V, Bruce Norman Moore | 2002-04-09 |
| 6300624 | Radiation detector | Ward E. Schultz, Larry L. Gadeken | 2001-10-09 |
| 5924499 | Acoustic data link and formation property sensor for downhole MWD system | James R. Birchak, Clarence Gerald Gardner | 1999-07-20 |