Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5607002 | Chemical refill system for high purity chemicals | Stephen H. Siegele, John N. Gregg | 1997-03-04 |
| 5590695 | Manifold systems for high purity chemical delivery systems | Stephen H. Siegele, John N. Gregg | 1997-01-07 |