Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7952218 | Buoyancy pump power system | Kenneth W. Welch, Jr., Curtis J. Rothi | 2011-05-31 |
| 7737572 | Buoyancy pump power system | Kenneth W. Welch, Jr., Curtis J. Rothi | 2010-06-15 |
| 7584609 | Buoyancy pump power system | Kenneth W. Welch, Jr., Curtis J. Rothi | 2009-09-08 |
| 7331174 | Buoyancy pump power system | Kenneth W. Welch, Jr., Curtis J. Rothi | 2008-02-19 |
| 7258532 | Buoyancy pump device | Kenneth W. Welch, Jr., Curtis J. Rothi | 2007-08-21 |
| 7059123 | Buoyancy pump power system | Kenneth W. Welch, Jr., Curtis J. Rothi | 2006-06-13 |
| 6953328 | Buoyancy pump device | Kenneth W. Welch, Jr., Curtis J. Rothi | 2005-10-11 |