Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5494381 | Apparatus and method for pneumatically conveying bulk materials | John R. Havrilla | 1996-02-27 |
| 5417330 | Apparatus for separating tramp material from a pneumatic conveying systgem | — | 1995-05-23 |
| 5368311 | Shaft seal assembly for a rotary valve | — | 1994-11-29 |
| 5078435 | Self-aligned flanged coupling | — | 1992-01-07 |
| 4889452 | Vented product pump and air filter arrangement | — | 1989-12-26 |
| 4830043 | Improvement in rotary valves | — | 1989-05-16 |
| 4770611 | Product pump assembly | — | 1988-09-13 |
| 4600032 | Rotary shaft seal assembly | — | 1986-07-15 |