| Number | Name | Date | Kind |
|---|---|---|---|
| D. 423523 | Hollinger et al. | Apr 2000 | |
| 4787127 | Beall | Nov 1988 | |
| 5297903 | Hilton | Mar 1994 | |
| 5908061 | Blichmann | Jun 1999 |
| Entry |
|---|
| Tradesman catalog; Mortising Machine #8120; p. 5, 1995. |
| Tool Specialists Online; www.toolies.com.au/ToolShop/catalogue/woodwork/0000K16C.htm?E+toolstore; Workcraft Mortising Machine (date unknown). |
| www.coastaltool.com/delt/de14650.htm; Delta 14-650 Hollow Chisel Mortiser; 1997. |