Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE48026 | Hydraulic switch machine for railroads | Donald Coy Beamon, Dilson Santos Rodrigues | 2020-06-02 |
| 9156479 | Hydraulic switch machine for railroads | Donald Coy Beamon, Dilson Santos Rodrigues | 2015-10-13 |
| 8669553 | Thin film transistors | Chris Knutson, John Wager, Douglas A. Keszler, Randy Hoffman | 2014-03-11 |
| 7946538 | External point spring locking device | Donald Coy Beaman, Dilson Santos Rodrigues | 2011-05-24 |