Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8064291 | Engine and technique for generating an acoustic signal | John W. Rapp, Nicholas J. Nagurny, Robert J. Howard | 2011-11-22 |
| 7944776 | Engine and technique for generating an acoustic signal | John W. Rapp, Nicholas J. Nagurny, Robert J. Howard | 2011-05-17 |