Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6651986 | Retractable packing ring lower half segment retaining key and method for retaining retractable packing ring lower half segment | Richard Jon Chevrette, George Kirby, Christopher Edward Wolfe | 2003-11-25 |