| Number | Name | Date | Kind |
|---|---|---|---|
| 583247 | Burnham | May 1897 | |
| 813253 | Sullivan | Feb 1909 | |
| 2500636 | Isakson | Mar 1950 | |
| 3256030 | Banse | Jun 1966 | |
| 3423898 | Tracy et al. | Jan 1969 | |
| 4335555 | Southerland et al. | Jun 1982 | |
| 4410294 | Gilb et al. | Oct 1983 |
| Number | Date | Country |
|---|---|---|
| 2411956 | Aug 1975 | DEX |
| 742617 | Dec 1955 | GBX |
| Entry |
|---|
| Harlen Metal Products, Inc., Structural Timber Connectors brochure, .COPYRGT.1977. |