Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691822 | Sound damping filter, ear protector, and method for manufacturing a membrane for a sound damping | Victor Joseph Ahton Meussen | 2004-02-17 |
| 4756393 | Apparatus for varying the damping characteristics of a shock absorber | Johannes J. de Baan, Marwin Kinzl | 1988-07-12 |