Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6412449 | Segmented lance assembly | Dana L. Joudrey | 2002-07-02 |
| 6237686 | Cementing plug | Robert Lawrence Ryll | 2001-05-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6412449 | Segmented lance assembly | Dana L. Joudrey | 2002-07-02 |
| 6237686 | Cementing plug | Robert Lawrence Ryll | 2001-05-29 |