Issued Patents All Time
Showing 1–25 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6575189 | Automatic valve | — | 2003-06-10 |
| 6318563 | Filter apparatus | — | 2001-11-20 |
| 6196395 | Filter device and method of operating same | — | 2001-03-06 |
| 6171495 | Automatic three-way valve | — | 2001-01-09 |
| 5964554 | Duplicating key machine and method of operating same | — | 1999-10-12 |
| 5858231 | Filter apparatus | — | 1999-01-12 |
| 5545321 | Filter apparatus | — | 1996-08-13 |
| 5496138 | Duplicating key machine and method of operating same | — | 1996-03-05 |
| 5393423 | Filter apparatus | — | 1995-02-28 |
| 5328604 | Filter system having bottom manifold and means for causing filter rotation | — | 1994-07-12 |
| 5316676 | Coiled filter strip with upstream and downstream butt ends | — | 1994-05-31 |
| 5228993 | Cleanable filter system with longitudinally movable and rotatable cleaning member | — | 1993-07-20 |
| 5213684 | Filter apparatus | — | 1993-05-25 |
| RE34218 | Easily-cleanable filters | — | 1993-04-13 |
| 5186825 | Filter apparatus | — | 1993-02-16 |
| 5176829 | Cooperating filter disk units with fingered surfaces | — | 1993-01-05 |
| 5174895 | Coiled filter strip with upstream and downstream butt ends | — | 1992-12-29 |
| 5112481 | Filter system having multiple filter elements and backflushing assemblies | — | 1992-05-12 |
| 5098565 | Filter apparatus | — | 1992-03-24 |
| 5074999 | Filter system having multiple filter elements and backflushing assemblies | — | 1991-12-24 |
| 5030349 | Filter apparatus | — | 1991-07-09 |
| 5030347 | Multiple filter elements with movable flushing assembly | — | 1991-07-09 |
| 5015379 | Coiled filter strip with upstream and downstream butt ends | — | 1991-05-14 |
| 5013461 | Regeneration method of filter device having filter aid material and piston apparatus | — | 1991-05-07 |
| 4978450 | Filtering element | — | 1990-12-18 |