Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6796749 | System for pneumatically conveying bulk particulate materials | John W. Pfeiffer | 2004-09-28 |
| 6722822 | System for pneumatically conveying bulk particulate materials | John W. Pfeiffer | 2004-04-20 |
| 6719500 | System for pneumatically conveying bulk particulate materials | John W. Pfeiffer | 2004-04-13 |
| 6682290 | System for handling bulk particulate materials | John W. Pfeiffer | 2004-01-27 |