Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877527 | Liquid filter of spiral wound construction with alternate layers of a surface area media and a depth media | — | 1989-10-31 |
| 4857195 | Liquid filter with a distorting portion for transmitting hydraulic forces | Joseph A. Borgia, Robert Gabrielson | 1989-08-15 |
| 4853118 | Liquid filter | Joseph A. Borgia, Robert Gabrielson | 1989-08-01 |