Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11891721 | Spool-balanced seed lift | Jiaqi Yin, Joel C. Stefl | 2024-02-06 |
| 11814746 | Seed lifting and rotating system for use in crystal growth | Joel C. Stefl | 2023-11-14 |
| 11739439 | Active cleaning vacuum system and method | Richard D. Webb, Brian M. Repman, Joel C. Stefl | 2023-08-29 |
| 11421346 | Active cleaning vacuum system and method | Richard D. Webb, Brian M. Repman, Joel C. Stefl | 2022-08-23 |
| 11255024 | Seed lifting and rotating system for use in crystal growth | Joel C. Stefl | 2022-02-22 |