¶ 15.48 Necessity for Good Drawings
The necessity for good drawings in a design patent application cannot be overemphasized. As the drawing constitutes the whole disclosure of the design, it is of utmost importance that it be so well executed both as to clarity of showing and completeness, that nothing regarding the design sought to be patented is left to conjecture. An insufficient drawing may be fatal to validity (35 U.S.C. 112, first paragraph). Moreover, an insufficient drawing may have a negative effect with respect to the effective filing date of a continuing application.