Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D492767 | Earplug | Richard Knauer, Marianne Grisdale, Gary F. Prokop | 2004-07-06 |
| D492768 | Earplug | Richard Knauer, Marianne Grisdale, Gary F. Prokop | 2004-07-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D492767 | Earplug | Richard Knauer, Marianne Grisdale, Gary F. Prokop | 2004-07-06 |
| D492768 | Earplug | Richard Knauer, Marianne Grisdale, Gary F. Prokop | 2004-07-06 |