Tooth brush with an anatomically compatible structure
Patent 5025525 Issued on June 25, 1991. Estimated Expiration Date: 
February 9, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 9, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References D190073 D285263 1657450 2094240 2253210 2304319 2360745 Toothbrush with curved bristles and handle Tooth brush Toothbrush Patent #: 4524478 InventorsApplicationNo. 478270 filed on 02/09/1990US Classes:15/167.1, Tooth or nail brush15/143.1Particular HandleExaminersPrimary: Coe, Philip R.Assistant: Cooley, C. Attorney, Agent or FirmInternational ClassA46B 009/04Foreign Application Priority Data1989-02-23 ESAbstractThe tooth brush having an anatomically compatible structure has a handle which is twisted in comparison to that of the conventional tooth brush so that a plane passing through the head of the tooth brush bearing the bristles and another plane passing through the handle cross each other at a certain angle. The handle is however preferably divided into two parts, a concavo-convex oblong section contiguous to the neck inclined with respect to the plane of the head and a rhombus-like cross sectioned end part which is also inclined with respect to the plane of the head, but in the opposite direction to that of the oblong section. The handle can be provided with a depression and shaped to fit the thumb and forefinger when gripped by the hand. Because of the structure of tooth brush, the bristles can be applied upright on the teeth, when the hand holds the handle in a more comfortable unstrained position than the conventional tooth brush. | |
