| Date | Action |
| 01/24/2001 | License Canceled |
| 04/18/2000 | License Transferred |
| 02/11/2000 | Internal Correction Applied |
| 08/13/1999 | License Converted |
| 04/22/1999 | Internal Correction Applied |
| 10/31/1998 | License Assigned (Full Assignment) |
| 09/17/1998 | Administrative Update Applied |
| 01/09/1997 | License Renewed |
| 08/27/1992 | License Modified |
| 07/16/1992 | License Modified |
| 08/07/1987 | License Modified |
| 08/31/1984 | License Modified |
| 08/14/1984 | License Modified |
| 03/28/1984 | License Modified |
| 03/23/1984 | License Modified |
| 03/08/1984 | License Modified |
| 04/14/1983 | License Modified |
| 09/19/1978 | License Modified |
| 07/15/1977 | License Modified |