| Classification | Number | Url | PMD | Priority | Assignee | Assignee Loc | Inventor(s) | Inventor Loc(s) | Filing Date | Issued Date |
| classification-0 | 6,369,603 | Radio frequency coupling apparatus and method for measuring minority carrier lifetimes in semiconductor materials | 6,369,603 | Yes
| Midwest Research Institute | Kansas City, MO | Johnston; Steven W.:Ahrenkiel; Richard K. | Golden, CO:Lakewood, CO | July 14, 2000 | April 9, 2002 |
| classification-0 | 6,275,060 | Apparatus and method for measuring minority carrier lifetimes in semiconductor materials | 6,275,060 | Yes
| Midwest Research Institute | Kansas City, MO | Ahrenkiel; Richard K.:Johnston; Steven W. | Lakewood, CO:Golden, CO | April 1, 1999 | August 14, 2001 |
| classification-0 | 5,929,652 | Apparatus for measuring minority carrier lifetimes in semiconductor materials | 5,929,652 | No | Midwest Research Institute | Kansas City, MO | Ahrenkiel; Richard K. | Lakewood, CO | September 2, 1997 | July 27, 1999 |
| classification-0 | 4,572,812 | Method and apparatus for casting conductive and semiconductive materials | 4,572,812 | No | The United States of America as represented by the Secretary of Energy | Washington, DC | Ciszek; Theodore F. | Evergreen, CO | August 13, 1984 | February 25, 1986 |