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| US3958482 | 15 Apr 1975 | 25 May 1976 | Nordisk Kartro Aktiebolag | Machine for cutting material |
| US4411183 | 28 Sep 1982 | 25 Oct 1983 | | Apparatus for cutting pie-shaped openings in fiberboard duct |
| US4787283 | 26 Mar 1987 | 29 Nov 1988 | | Metal stud and channel cornering die |
| US4875274 | 19 May 1988 | 24 Oct 1989 | | Method of cutting metal stud and bending and securing same to form angel member |
| US5943933 | 23 Jul 1997 | 31 Aug 1999 | | Cutting mechanism |
| US6675686 | 7 Jun 2002 | 13 Jan 2004 | Dan-List A/S Maskinfabrik | Apparatus for production of a bar notch |
