Infringement Opinion

A patent infringement opinion (also called a freedom-to-operate or FTO opinion) is a formal written legal analysis prepared by a patent attorney assessing whether a specific product, process, or service infringes one or more specific patents: STRUCTURE OF AN OPINION: (1) IDENTIFICATION OF SUBJECT MATTER: describes the product or process being analyzed; (2) CLAIM CONSTRUCTION: interprets the language of each claim in the patent being analyzed, applying the broadest reasonable construction or the Philips standard used in district courts; (3) LIMITATION-BY-LIMITATION COMPARISON: compares each element of each claim to the corresponding feature (or absence of feature) of the accused product; (4) LITERAL INFRINGEMENT ANALYSIS: assesses whether each element reads literally on the product; (5) DOCTRINE OF EQUIVALENTS ANALYSIS: if literal infringement is not found, assesses whether equivalent elements are present (same function, way, result); (6) CONCLUSION: states a conclusion about whether infringement is likely, possible, or unlikely; TYPES OF OPINIONS: non-infringement opinion (element is missing, claim is not infringed); invalidity opinion (patent is likely invalid); unenforceability opinion (inequitable conduct, prosecution history issues); LEVEL OF CERTAINTY: opinions typically express conclusions as 'strong non-infringement position,' 'reasonable non-infringement argument,' or 'infringement likely' — not absolute certainty; WHEN NEEDED: before product launch, before acquiring patent-encumbered technology, before entering a new market segment, when threatened with infringement, in connection with insurance; QUALIFIED AUTHOR: must be authored by a patent attorney (not just an attorney) — someone with technical training and USPTO registration.

The primary strategic purpose of an infringement opinion is to establish a defense against willful infringement claims and potential treble damages: ENHANCED DAMAGES STATUTE: 35 U.S.C. § 284 authorizes courts to increase damages up to three times the amount found or assessed; PRE-HALO STANDARD: Seagate Technology (Fed. Cir. 2007) — two-part test requiring (1) objectively reckless standard of risk; (2) subjective awareness of that risk; obtaining an opinion provided a strong defense to both prongs; HALO ELECTRONICS, INC. v. PULSE ELECTRONICS (S.Ct. 2016): abolished the rigid Seagate test; the Court held that 'willful' in § 284 means conduct that is 'deliberate or intentional' — not just reckless; enhanced damages should be reserved for 'egregious cases of misconduct beyond typical infringement'; subjective bad faith is the key inquiry; CURRENT STANDARD: willfulness is now a more subjective inquiry: did the infringer know about the patent? Did the infringer have a good-faith belief in non-infringement? Was the infringement deliberate, knowing, or wanton?; A GOOD-FAITH OPINION HELPS: a non-infringement opinion from qualified counsel demonstrates that the accused infringer: (a) knew about the patent; (b) took steps to evaluate whether their product infringed; (c) relied on a reasoned legal conclusion that it did not infringe; this supports a finding that the infringement was not willful (not 'egregious misconduct'); WAIVER OF PRIVILEGE: if a defendant invokes the opinion as a defense, they waive attorney-client privilege over the opinion and related communications; courts require producing the opinion, correspondence about it, and underlying work product.

Attorney-client privilege protects infringement opinions from discovery, but asserting them as a defense triggers waiver: PROTECTED BY DEFAULT: an infringement opinion is attorney-client privileged if: (1) authored by a licensed attorney; (2) prepared in the course of the attorney-client relationship; (3) kept confidential; (4) requested for legal advice (not business decisions); WHAT IS PROTECTED: the opinion letter itself; oral advice from counsel about infringement; internal notes and draft opinions; communications between attorney and client about the opinion's conclusion; WHAT IS NOT PROTECTED: underlying factual information (patent copies, product specs, prior art) — these are not privileged; communications that were disclosed to third parties; technical analysis disconnected from legal advice; WAIVER BY ASSERTION: if the accused infringer invokes the opinion at trial as a defense to willfulness, they waive privilege over: the opinion itself; all communications between counsel and client about the opinion; related work product; related legal advice on the same subject matter; this is a significant strategic decision — the client must choose between keeping the opinion privileged (and potentially losing the willfulness defense) or waiving privilege to use the opinion defensively; IN-HOUSE vs. OUTSIDE COUNSEL: courts have sometimes given less weight to in-house counsel opinions, though formal privilege protection applies to both; outside counsel opinions are typically more persuasive to courts and juries; DRAFT OPINIONS: draft opinions may also be discoverable if the defendant waives privilege; often the final opinion and drafts are both produced.

These related but distinct legal services address different questions about patent risk: FREEDOM-TO-OPERATE (FTO) SEARCH: a search for patents that might cover a planned product or process; searches multiple databases (USPTO, Espacenet, Google Patents) to identify potentially blocking patents; provides a LIST of patents to be analyzed — not itself an opinion on infringement; much broader in scope than an infringement opinion (which analyzes a specific patent); INFRINGEMENT OPINION: a claim-by-claim legal analysis of whether a specific product infringes a SPECIFIC patent; requires detailed claim construction and technical comparison; narrower but deeper than an FTO search; answers: 'does our product infringe Patent X?'; VALIDITY OPINION (also called INVALIDITY OPINION): analyzes whether a specific patent is valid — likely to be found invalid in litigation or IPR; covers § 102 anticipation (prior art that anticipates), § 103 obviousness, § 101 subject matter eligibility, § 112 written description/enablement; answers: 'is this patent likely invalid?'; often obtained together with an infringement opinion: if the product infringes, can we attack the patent's validity?; FTO CLEARANCE vs. COMPREHENSIVE OPINION: a quick FTO clearance checks the identified patents broadly; a formal opinion digs deeper into specific patents of concern; COMBINED ANALYSIS: most sophisticated FTO opinions combine: (1) search for relevant patents; (2) claim construction for patents of concern; (3) non-infringement analysis for those patents; (4) invalidity analysis for patents where infringement risk is elevated.

Practical guidance on when to commission an infringement opinion: TIMING — BEFORE PRODUCT LAUNCH: the most important time to obtain an opinion; before any product containing the potentially infringing technology is made, used, or sold; obtaining an opinion AFTER launch does not eliminate willfulness for pre-opinion activity; TRIGGERS FOR AN OPINION: (1) a competitor holds a patent in your technology space; (2) you've received a cease-and-desist letter; (3) a competitor has been sued for similar technology; (4) you're designing a product around a specific patent; (5) you're acquiring a company and conducting IP due diligence; (6) your patent counsel identifies a blocking patent during prosecution; CEASE-AND-DESIST LETTERS: receiving a C&D letter puts you on notice of the patent; from that point, continuing to make/sell without obtaining an opinion is evidence of willful infringement; COST: simple opinion (one patent, straightforward technology): $5,000–$15,000; complex opinion (one patent, complex technology): $15,000–$50,000; comprehensive FTO study (many patents, new product): $50,000–$200,000+; costs increase with claim complexity, technical complexity, number of patents, and level of detail required; PATENT RISK vs. OPINION COST: when a product generates $1M+ annually, a $20,000 opinion is cost-effective; when a product is a small side project, a full opinion may be disproportionate; UPDATES: opinions should be updated when: new patents issue; the product design changes; the patent owner amends claims in reexamination or continuation; a court issues a claim construction ruling on the patent.