Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5331850 | Apparatus for indicating the level of a material in a container | — | 1994-07-26 |
| 4967783 | Recirculation valve with pilot valve | — | 1990-11-06 |
| 4941502 | Low pressure recirculation valve | Horace J. Maxwell | 1990-07-17 |
| 4779639 | Automatic recirculation valve | Ervin Skovgaard | 1988-10-25 |