Ownership History
| DAYTON SUPERIOR CORPORATION; RICHMOND SCREW ANCHOR CO | $0 | | 1190-0116 | 04/24/1974 |
| SHATTOCK, DENN MINING CORP | $0 | | 1146-0177 | 11/05/1971 |
| GREATER POTTS IND DEV CORP-REF | $0 | | 1073-0868 | 01/31/1966 |
| GREATER POTTS IND DEV CORP | $0 | | 1071-1174 | 08/10/1965 |
| MINNIG, WILLIAM E & ERMA M | $0 | | 1042-0291 | 01/12/1963 |