Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6364923 | Method and apparatus for the clean replacement of contaminated HEPA filters | Stanley G. Wiedmeyer, Arthur A. Frigo, Daniel P. Preuss, Edward F. Bielick | 2002-04-02 |
| 5347816 | Variable pressure thermal insulating jacket | Paul A. Nelson, Albert A. Chilenskas | 1994-09-20 |