Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5526805 | In-line silencer for clean room breathing apparatus | Donald G. Lutz, Richard Dryden | 1996-06-18 |
| 5253538 | Method and device for quantifying particles on a surface | Robert H. Swick, Donald G. Lutz, Richard Dryden | 1993-10-19 |