| Classification | Number | Url | PMD | Priority | Assignee | Assignee Loc | Inventor(s) | Inventor Loc(s) | Filing Date | Issued Date |
| classification-0 | 6,068,446 | Airfoils for wind turbine | 6,068,446 | No | Midwest Research Institute | Kansas City, MO | Tangler; James L.:Somers; Dan M. | Boulder, CO:State College, PA | November 20, 1997 | May 30, 2000 |
| classification-0 | 5,562,420 | Airfoils for wind turbine | 5,562,420 | No | Midwest Research Institute | Kansas City, MO | Tangler; James L.:Somers; Dan M. | Boulder, CO:State College, PA | March 14, 1994 | October 8, 1996 |
| classification-0 | 5,417,548 | Root region airfoil for wind turbine | 5,417,548 | No | Midwest Research Institute | Kansas City, MO | Tangler; James L.:Somers; Dan M. | Boulder, CO:State College, PA | January 14, 1994 | May 23, 1995 |