Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5661460 | Distance determination and alarm system | Walter James Budzyna, Charles E. Sawabini, Drew E. Sunstein | 1997-08-26 |
| 5589821 | Distance determination and alarm system | W. James Budzyna, Charles E. Sawabini | 1996-12-31 |