Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8893895 | Cartridge filter assembly | James A. Clark, James G. Spencer | 2014-11-25 |
| 6629003 | Batch processing control system recipe management and batch information system | Gregory R. Smith, James G. Spencer | 2003-09-30 |