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| US4132129 | 3 Jun 1977 | 2 Jan 1979 | Raytheon Company | Wedge lock knob assembly |
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| US4936162 | 10 Jul 1989 | 26 Jun 1990 | | Adjustment screw arrangement |
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| US6288351 | 21 Dec 1999 | 11 Sep 2001 | Maytag Corporation | Timer knob attachment |
| US6394081 | 16 Jun 2000 | 28 May 2002 | Comercial Acros Whirlpool, S.A. DE C.V. | Safety knob for domestic gas apparatuses |
