| Date | Action |
| 04/05/2001 | License Canceled |
| 08/22/2000 | License Renewed |
| 05/07/2000 | Renewal Reminder Letter Sent |
| 08/13/1999 | License Converted |
| 01/04/1999 | Internal Correction Applied |
| 12/28/1998 | Internal Correction Applied |
| 12/21/1998 | Internal Correction Applied |
| 08/27/1997 | Internal Correction Applied |
| 07/10/1997 | Internal Correction Applied |
| 05/08/1997 | Internal Correction Applied |
| 01/15/1992 | License Assigned (Full Assignment) |
| 08/29/1990 | License Renewed |
| 08/12/1988 | License Modified |
| 11/26/1986 | License Modified |
| 10/09/1986 | License Modified |
| 08/29/1985 | Application Granted |