Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6920896 | Visual position indicator for valves with linear moving valve stem | Leon Kerger | 2005-07-26 |
| 6655316 | Visual position indicator for valves with linear moving valve stem | Leon Kerger | 2003-12-02 |