Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680768 | Concentric pulse tube expander with vacuum insulator | Alan A. Rattray, Frithjof N. Mastrup | 1997-10-28 |
| 5647219 | Cooling system using a pulse-tube expander | Alan A. Rattray, Carl S. Kirkconnell, Kenneth D. Price, Samuel C. Russo | 1997-07-15 |
| 5613365 | Concentric pulse tube expander | Firithjof N. Mastrup, Alan A. Rattray | 1997-03-25 |
| 4829162 | Maintenance of uniform optical window properties | Lowell M. Hobrock | 1989-05-09 |