| Date | Action |
| 06/19/2004 | License Canceled |
| 04/20/2004 | License Assigned (Full Assignment) |
| 02/13/2003 | Administrative Update Applied |
| 07/21/2002 | License Assigned (Full Assignment) |
| 07/01/2001 | License Transferred |
| 03/13/2001 | License Renewed |
| 11/13/2000 | Renewal Reminder Letter Sent |
| 04/12/2000 | License Assigned (Full Assignment) |
| 08/14/1999 | License Converted |
| 04/12/1999 | License Modified |
| 06/27/1997 | License Modified |
| 07/31/1996 | License Assigned (Full Assignment) |
| 09/30/1993 | License Modified |
| 08/19/1993 | License Modified |
| 08/03/1993 | License Modified |
| 04/17/1991 | License Renewed |
| 11/02/1988 | License Modified |
| 10/27/1987 | License Modified |
| 08/19/1985 | License Modified |
| 03/15/1985 | Application Granted |