| Date | Action |
| 07/07/2000 | License Canceled |
| 01/20/2000 | License Assigned (Full Assignment) |
| 08/27/1999 | License Converted |
| 08/13/1999 | License Converted |
| 02/24/1999 | License Renewed |
| 12/02/1998 | Internal Correction Applied |
| 12/02/1998 | License Assigned (Full Assignment) |
| 04/18/1995 | License Assigned (Full Assignment) |
| 02/28/1994 | License Modified |
| 10/07/1993 | License Modified |
| 04/24/1992 | License Modified |
| 10/31/1991 | License Modified |
| 03/22/1991 | License Modified |
| 03/04/1991 | License Modified |
| 10/29/1990 | License Modified |
| 03/05/1990 | License Modified |
| 02/22/1990 | License Modified |
| 12/15/1989 | License Modified |
| 08/10/1989 | License Modified |
| 08/01/1989 | License Modified |
| 07/19/1989 | License Modified |
| 11/14/1988 | License Modified |
| 11/07/1988 | License Modified |
| 08/26/1988 | License Modified |
| 11/09/1984 | License Modified |
| 09/02/1983 | License Issued |