Patent Litigation Strategies Handbook Third Edition
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Patent Litigation Strategies Handbook Third Edition Editors-in-Chief Barry L. Grossman Foley & Lardner Milwaukee, WI Gary M. Hoffman Dickstein Shapiro LLP Washington, DC Chapter 28: Patent Defenses Tom Filarksi and Heather N. Shafer Section of Intellectual Property Law A American Bar Association Bloomberg BNA, Arlington, VA Copyright © 2010 American Bar Association Chicago, IL Second Printing, August 2014 Reprinted by Permission Library of Congress Cataloging-in-Publication Data Patent litigation strategies handbook / editors-in-chief, Barry L. Grossman, Gary M. Hoffman. -- 3rd ed. p. cm. “Section of Intellectual Property Law, American Bar Association.” Includes index. ISBN 978-1-57018-886-2 1. Patent suits--United States. 2. Patent laws and legislation--United States. I. Grossman, Barry L. II. Hoffman, Gary M. III. American Bar Association. Section of Intellectual Property Law. KF3155.P37 2010 346.7304'86--dc22 2010002289 The materials contained herein represent the opinions of the authors and editors and should not be construed to be those of the American Bar Association or the Section of Intellectual Property Law. Nothing contained herein is to be considered as the rendering of legal advice for specific cases, and readers are responsible for obtaining such advice from their own legal counsel. These materials and any forms and agreements herein are intended for educational and informational purposes only. Published by Bloomberg BNA 1801 S. Bell Street, Arlington, VA 22202 bna.com/bnabooks ISBN 978-1-57018-886-2 Printed in the United States of America CHAPTER 28 PATENT DEFENSES* I. Introduction ............................................................................................ 1224 II. Noninfringement ..................................................................................... 1225 A. Infringement .................................................................................... 1225 1. Section 271(e): Limited Safe Harbor ......................................... 1229 a. “Reasonably Related” .......................................................... 1230 b. “Patented Invention” ............................................................ 1231 2. Section 271(f): Acts Within the United States ........................... 1232 3. Section 271(g): Defense Not Available in Section 1337 (ITC) Actions ....................................................................................... 1235 4. Section 271(b): Inducement of Infringement ............................. 1235 B. Limits on Infringement .................................................................... 1236 1. Claim Interpretation and Correction of Errors ........................... 1236 2. Prosecution History Estoppel ..................................................... 1239 3. Material Disclosed but Not Claimed .......................................... 1246 C. Section 272 ...................................................................................... 1248 D. Section 273: First-Inventor Defense to Business Method Patent .... 1249 E. Advice-of-Counsel Defense to Willful Infringement ...................... 1250 III. Invalidity ................................................................................................. 1251 A. Invalidity Based on the Prior Art ..................................................... 1252 1. Anticipation ................................................................................ 1252 2. Inherent Anticipation ................................................................. 1255 3. Obviousness ............................................................................... 1256 B. Reliance on Art Already Cited by the PTO...................................... 1261 C. Invalidity Based on Loss of Right ................................................... 1263 D. Invalidity Based on Inadequacies in the Specification or Claims .... 1268 1. The Enablement Requirement .................................................... 1268 2. The Written-Description Requirement ....................................... 1269 3. The Best Mode Requirement ..................................................... 1274 4. The Requirements of Claim Definiteness .................................. 1275 5. The Subject Matter That the Applicant Regards as His Invention .............................................................................. 1279 E. Invalidity Based on Nonstatutory Double Patenting ....................... 1280 F. The Section 282 Notice ................................................................... 1281 G. Pleading Invalidity ........................................................................... 1281 IV. Inequitable Conduct ................................................................................ 1282 *Tom Filarski, Brinks Hofer Gilson & Lione, P.C., Heather N. Schafer, Creative Ventures Law Center, P.C., Chicago, Illinois. We thank Kourtney N. Baltzer, Harvard Law School, Class of 2013, for her contribu- tion to this work. 1223 1224 PATENT LITIGATION STRATEGIES HANDBOOK CH. 28. A. Materiality ........................................................................................ 1282 B. Intent ................................................................................................ 1283 C. Pleading Inequitable Conduct .......................................................... 1286 V. Antitrust .................................................................................................. 1287 A. Walker Process Claim ...................................................................... 1288 B. Sham Litigation ............................................................................... 1291 C. Tying Arrangements ......................................................................... 1291 VI. Patent Misuse .......................................................................................... 1294 A. Patent Misuse and the First Sale Doctrine ....................................... 1295 B. Patent Misuse and Contributory Infringement ................................ 1297 C. Patent Misuse and License Agreements .......................................... 1297 D. Bad Faith by Patentee ...................................................................... 1300 VII. Laches and Equitable Estoppel ............................................................... 1301 A. Laches .............................................................................................. 1301 B. Estoppel ........................................................................................... 1302 C. Prosecution Laches .......................................................................... 1302 VIII. Ownership and Licenses ......................................................................... 1305 IX. Contractual Estoppel Defense to Enforcement of a Patent..................... 1313 X. Obviousness-Type Double Patenting ...................................................... 1315 XI. Sovereign Immunity Defense to Enforcement of a Patent ..................... 1316 XII. No “Practicing Prior Art” and “Reverse Doctrine of Equivalents” Defenses ............................................................................ 1320 A. Practicing Prior Art .......................................................................... 1320 B. Reverse Doctrine of Equivalents ..................................................... 1320 XIII. Section 1498(a): Government Contractor Defense ................................ 1321 XIV. Exception for Experimental Use............................................................. 1322 XV. Declaratory Judgment ............................................................................. 1323 XVI. Conclusion .............................................................................................. 1324 I. INTRODUCTION Typical defenses found in a patent case are noninfringement, invalidity, unenforceability, fraud, laches, estoppel, and violations of the antitrust laws. Defending against a charge of infringement involves rebutting evidence, because the burden of proof to establish liability rests on the patent holder. In contrast, raising a defense of invalidity, unenforceability, fraud, laches, or estoppel or making an antitrust claim places the burden of proof on the accused infringer. According to the patent statute, a defendant can plead the following defenses in any action involving the infringement or validity of a patent: (1) Noninfringement, absence of liability for infringement or unenforce- ability, (2) Invalidity of the patent or any claim in suit on any ground specified in part II of this title as a condition of patentability, (3) Invalidity of the patent or any claim in suit for failure to comply with any requirement of Sections 112 or 251 of this title, (4) Any other fact or act made a defense by this title.1 135 U.S.C. §282. CH. 28.II.A. PATENT DEFENSES 1225 Furthermore, the Federal Rules of Civil Procedure require a party to affirma- tively set forth laches, estoppel, fraud, license, and any other matter constituting an avoidance or affirmative defense in the pleading.2 A defendant can claim that a patent is invalid by demonstrating it does not meet the conditions for patentability as specified under Part II of the patent statute. This part of the patent statute contains Sections 100 through 212, but only two of these specify conditions for patentability. Section 102 sets forth the conditions of novelty and loss of right, and 103 sets out the condition of nonobviousness.