The following excerpt is from Herschensohn v. Hoffman, 593 F.2d 893 (9th Cir. 1979):
None of these listed "purposes" of the patent produce a "new or different function" (Anderson's-Black Rock v. Pavement Co., 396 U.S. 57 at 60, 90 S.Ct. 305, 24 L.Ed.2d 258 (1969)) from that produced by the old elements in the combination.
The above passage should not be considered legal advice. Reliable answers to complex legal questions require comprehensive research memos. To learn more visit www.alexi.com.