Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5339844 | Low cost equipment for cleaning using liquefiable gases | Sidney C. Chao | 1994-08-23 |
| 5337446 | Apparatus for applying ultrasonic energy in precision cleaning | Charles W. Smith, Jr. | 1994-08-16 |
| 5316591 | Cleaning by cavitation in liquefied gas | Sidney C. Chao, Edna M. Purer, Carl W. Townsend | 1994-05-31 |