Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9734686 | System and method for enhancing a proximity warning sound | John Patrick Grenn, Phillip A. Hetherington | 2017-08-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9734686 | System and method for enhancing a proximity warning sound | John Patrick Grenn, Phillip A. Hetherington | 2017-08-15 |