Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6091068 | Ion collector assembly | William Parfitt, Louis C. Frees, Robert E. Ellefson | 2000-07-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6091068 | Ion collector assembly | William Parfitt, Louis C. Frees, Robert E. Ellefson | 2000-07-18 |