The Ninth Circuit’s model patent jury instructions have been withdrawn. The following patent jury instructions are a helpful source:
United States District Court, Northern District of California, Model Patent Jury Instructions (2004). The instructions can be accessed at http://www.cand.uscourts.gov/ 
Other sources of patent jury instructions that may be helpful include:
American Bar Association Section of Litigation, Modern Jury Instructions: Patent Litigation (A.B.A., Chicago, Ill., 2005).
Federal Circuit Bar Association, Model Patent Jury Instructions (2002). The instructions can be accessed at:
Fifth Circuit Pattern Jury Instructions (Civil), ch. 9 (2006). The instructions can be accessed at http://www.lb5.uscourts.gov/juryinstructions/2006CIVIL.pdf 
Eleventh Circuit Pattern Jury Instructions—Civil Cases (2005), Instruction 8.1. The instructions can be accessed athttp://www.ca11.uscourts.gov/documents/pdfs/civjury.pdf 
Kevin F. O’Malley, et al., Federal Jury Practice and Instructions ch. 158 Patent Infringement (5th ed.) (Thomson West 2001).
Leonard B. Sand, Modern Federal Jury Instructions ch. 86 Patents (Matthew Bender, 2001).
United States District Court, District of Delaware, Uniform Jury Instructions for Patent Cases (1993). The instructions can be accessed at the following web site (click on forms) http://www.ded.uscourts.gov/JuryMain.htm