Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8054985 | Low sound attenuating hearing protection device with filter arrangement | — | 2011-11-08 |
| 7697706 | Low sound attenuating hearing protection device | — | 2010-04-13 |
| 7510046 | Low attenuating push-in earplug with integral handle | — | 2009-03-31 |
| D538924 | Earplug with integral handle | — | 2007-03-20 |
| D528204 | Hearing protection device | Richard Knauer | 2006-09-12 |
| D524937 | Hearing protection device | Richard Knauer | 2006-07-11 |
| D481118 | Earplug | Richard Knauer | 2003-10-21 |
| 6021526 | Hearing protection device | Robert N. Falco | 2000-02-08 |
| 6006361 | Hearing protection device | Robert N. Falco | 1999-12-28 |
| 5983399 | Hearing protection device | Robert N. Falco | 1999-11-16 |
| D415833 | Hearing protection device | Robert N. Falco | 1999-10-26 |
| D410283 | Hearing protection device | Robert N. Falco | 1999-05-25 |
| D410079 | Hearing protective device | Robert N. Falco | 1999-05-18 |
| D409743 | Hearing protection device | Robert N. Falco | 1999-05-11 |
| 5809574 | Hearing protection device | Robert N. Falco | 1998-09-22 |