¶ 15.50    Use of Broken Lines for Indicating Unimportant Features Not Permitted

The ornamental design which is being claimed must be shown in solid lines in the drawing. Broken lines for the purpose of indicating unimportant or immaterial features of the design are not permitted. There are no portions of a claimed design which are immaterial or unimportant. See In re Blum, 374 F.2d 904, 153 USPQ 177 (CCPA 1967) and In re Zahn, 617 F.2d 261, 204 USPQ 988 (CCPA 1980).