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It's best to include surface shading in your design patent drawings to prevent a rejection by the US patent office. Design patents are all about the visual representation and understanding the overall structure. Often times the structure may be understood without the shading but why take the chance. Hire a good professional patent illustrator who will ...


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Here is an excerpt from USPTO example. The cross-outs didn't come over in my cut and paste so do look at the link. Amendments to the Specification: Please replace paragraph [0021] with the following amended paragraph: [0021] In the construction of the bucket of this invention, various materials have been selected [[and]] which offer a number of ...


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