| Date | Action |
| 04/02/2003 | License Canceled |
| 09/08/2001 | License Renewed |
| 08/06/2001 | Renewal Reminder Letter Sent |
| 07/12/2001 | Administrative Update Applied |
| 02/21/2001 | Administrative Update Applied |
| 12/21/2000 | Administrative Update Applied |
| 05/09/2000 | Administrative Update Applied |
| 08/13/1999 | License Converted |
| 09/12/1996 | License Renewed |
| 10/31/1991 | License Modified |
| 09/23/1991 | License Modified |
| 02/13/1991 | License Modified |
| 01/12/1988 | License Modified |
| 11/07/1986 | License Modified |
| 06/28/1985 | License Modified |
| 06/01/1984 | License Modified |
| 05/31/1984 | License Assigned (Full Assignment) |
| 05/02/1984 | License Modified |
| 03/12/1982 | License Modified |
| 10/15/1977 | License Modified |