Ownership History
| TILCON INC | $0 | | 1397/0119 | 01/28/2002 |
| TILCON MINERALS INC | $0 | | 0768/0815 | 01/01/1999 |
| TILCON-WARREN MINERALS INC | $0 | | 0746/0297 | 04/26/1979 |
| | $0 | | 0719/1040 | 06/22/1976 |
| ASHLAND OIL INC | $0 | | 0638/0367 | 08/02/1968 |
| NEW HAVEN TRAP ROCK CO | $0 | | 0531/0013 | 07/16/1935 |
| THE CONNETICUT QUARRIES CO | $0 | | 0184/0092 | 01/01/1900 |
| THE CONNETICUT QUARRIES CO | $0 | | 0184/0090 | 01/01/1900 |