Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6253873 | Gas guide element with sound-absorbent walls for blocking and damping noise spreading from it into main conduits | Richard Norres | 2001-07-03 |
| 5731557 | Fluid guiding element for blocking and damping noise propagating in main passages | Richard Norres | 1998-03-24 |