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| US4253832 | 23 Oct 1978 | 3 Mar 1981 | Young Dental Manufacturing Company, Inc. | Dental handpiece | | US5131846 | 16 Ene 1992 | 21 Jul 1992 | | Prophy cup shield | | US5642995 | 16 Ago 1995 | 1 Jul 1997 | Young Dental Manufacturing Company | Dental prophylaxis angle with seal protector | | US5690488 | 25 Abr 1996 | 25 Nov 1997 | Spintech, Inc. | Anti-splattering rotary dental instrument for cleaning teeth | | US6203322 | 15 Abr 1999 | 20 Mar 2001 | | Dental prophylaxis angle |
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