Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6452191 | Multiple cell radiation detector system, and method, and submersible sonde | Larry O. Johnson, Robert S. Lawrence, Ervin G. Grafwallner | 2002-09-17 |
| 5552610 | Device and method for accurately measuring concentrations of airborne transuranic isotopes | E. Wayne Killian, Ervin G. Grafwallner, Ronnie L. Kynaston, Larry O. Johnson, Peter D. Randolph | 1996-09-03 |