| Date | Action |
| 02/12/2000 | License Canceled |
| 01/13/2000 | License Assigned (Full Assignment) |
| 10/23/1999 | Administrative Update Applied |
| 08/13/1999 | License Converted |
| 01/08/1998 | Internal Correction Applied |
| 12/11/1997 | License Renewed |
| 06/27/1997 | Internal Correction Applied |
| 06/13/1997 | Internal Correction Applied |
| 02/09/1993 | License Modified |
| 01/29/1993 | License Modified |
| 10/21/1991 | License Modified |
| 06/28/1991 | License Modified |
| 06/28/1991 | License Modified |
| 06/12/1991 | License Modified |
| 04/05/1990 | License Modified |
| 02/26/1990 | License Modified |
| 05/10/1985 | License Modified |
| 05/01/1985 | License Modified |
| 11/05/1980 | License Modified |