Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6938874 | Spanner for a ball valve | Marek Wroblewski, Marian Wlodarczyk | 2005-09-06 |
| 6938876 | Ball valve with retractable seals and method of replacement thereof | Stanislaw Kaluza | 2005-09-06 |