Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8025474 | Battery-changing vehicle with cantilevered boom | Eric Douglas Springston, II, John R. Pratt | 2011-09-27 |
| 7938612 | Battery-changing vehicle with cantilevered boom | Eric Douglas Springston, II, John R. Pratt | 2011-05-10 |