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| US4253013 | 11 Aug 1978 | 24 Feb 1981 | Mabuchi Motor Co., Ltd. | Electric heating device for warming the shaving head of an electric shaver |
| US5036178 | 14 Mar 1990 | 30 Jul 1991 | | Heater unit for heating container for moist tissues |
| US5208896 | 31 Aug 1990 | 4 May 1993 | | Electrically warmed baby bottle with rechargeable battery recharging system |
| US6417498 | 12 Apr 2001 | 9 Jul 2002 | | Neonatal substrate warmer |
| US6870135 | 8 Jan 2004 | 22 Mar 2005 | HLC Efficiency Products LLC | Beverage container warmer |
| US6921880 | 30 Mar 2004 | 26 Jul 2005 | Constance F. Berger | Apparatus for heating bottles and method of manufacturing same |