什么是一项发明创造的本质特征？确定一项发明创造的本质特征是撰写出一份高质量的权利要求书的前提，那么，由形状、构造或者结合所反映出来的一项产品的必要的技术特征是否就是一项发明创造的本质特征呢？请看下面一个名为“一种整体式削皮刀”的实用新型专利的申请案例... What is an essential feature of inventions? Determining the essential feature of an invention is the premise that a high-quality claim is made, and whether the necessary technical features of a product as reflected in shape, structure or combination are an invention in essence Features? Take a look at the following application case for a utility model patent titled “An Integral Pater ...”