| Number | Name | Date | Kind |
|---|---|---|---|
| 4230416 | Gilb | Oct 1980 | |
| 4410294 | Gilb | Oct 1983 | |
| 4423977 | Gilb | Jan 1984 | |
| 4480941 | Gilb et al. | Nov 1984 | |
| 4572695 | Gilb | Feb 1986 | |
| 4717279 | Commins | Jan 1988 | |
| 4817359 | Colonias | Apr 1989 | |
| 4890436 | Colonias | Jan 1990 | |
| 4897979 | Colonias | Feb 1990 | |
| 4964253 | Loeffler | Oct 1990 | |
| 5042217 | Bugbee | Aug 1991 |
| Entry |
|---|
| Page f/Cleveland Steel Specialty Co. catalog copyright 1986. |
| Lumberlok catalog, cover page and p. 37. |