Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684461 | Sleep prevention device for a driver of a vehicle | — | 1997-11-04 |
| 5664744 | Railway highway crossing signal | James P. Chew, Santo A. DeFrancesco | 1997-09-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684461 | Sleep prevention device for a driver of a vehicle | — | 1997-11-04 |
| 5664744 | Railway highway crossing signal | James P. Chew, Santo A. DeFrancesco | 1997-09-09 |