Patent Clearance Search

A patent clearance search (also called a freedom-to-operate search or FTO search) is an investigation to determine whether a proposed product, process, or service will infringe any valid, unexpired patents in a target market: PATENT CLEARANCE / FTO SEARCH: objective = identify unexpired issued patents that could cover the proposed product; the question is 'are we free to operate?'; scope = all unexpired patents in the relevant jurisdiction(s); focused on current and near-future commercial activity; PATENTABILITY SEARCH (prior art search): objective = find prior art (patents, publications, public disclosures) that might prevent the inventor from obtaining a patent; the question is 'can we get a patent?'; scope = all prior art regardless of age or country of origin; focused on novelty and non-obviousness of the inventor's claims; KEY DIFFERENCES: (1) PATENT CLEARANCE searches only at UNEXPIRED patents (those that might block commercial activity); expired patents cannot be infringed but CAN be prior art; (2) PATENTABILITY SEARCHES look at expired and foreign patents too because they are relevant to novelty; (3) PATENT CLEARANCE examines claims against the proposed PRODUCT; patentability searches examine the inventor's claimed invention against prior art; (4) BOTH are distinct from an INVALIDITY SEARCH (which specifically targets prior art to invalidate a patent that is blocking the company's product or that is asserted against them in litigation).

A thorough FTO analysis involves multiple steps beyond simply running database searches: STEP 1 — PRODUCT/PROCESS SPECIFICATION: clearly define the product, process, or service being evaluated; identify all potentially relevant features and steps; STEP 2 — DATABASE SEARCH: search USPTO, EPO, and other relevant databases for unexpired patents in applicable jurisdictions; search terms should include: technical concepts, component names, function descriptions, inventor names in the field, assignee names (known competitors); tools: USPTO Patent Full-Text Database, Espacenet (EPO), Google Patents, Lens.org, commercial databases (Derwent, PatSnap); STEP 3 — INITIAL TRIAGE: review search results to identify potentially relevant patents; many results can be quickly eliminated because they are in unrelated technical areas; flag patents with claims that may cover aspects of the proposed product; STEP 4 — CLAIM ANALYSIS: for each flagged patent, carefully read the patent claims; independent claims are the most important; a claim must be read as a whole (all elements must be present for infringement); STEP 5 — CLAIM CHART: prepare a claim chart comparing each relevant patent claim element to the proposed product feature-by-feature; this is the core analytical work; STEP 6 — LEGAL OPINION: patent attorney prepares a formal FTO opinion letter analyzing infringement risk and, if applicable, invalidity of blocking patents; STEP 7 — BUSINESS DECISIONS: based on the opinion, the company may proceed with commercial launch, design around blocking claims, seek a license, or challenge validity.

FTO searches are valuable but have important limitations that businesses must understand: PUBLICATION DELAY — PATENT APPLICATIONS: published patent applications are not yet enforceable (only issued patents can be infringed); BUT a pending application may issue and then be enforced against a product that is already on the market; companies should also search published applications to identify potential future blocking patents; SEARCH INCOMPLETENESS: no search is 100% comprehensive; patent databases use different indexing systems; some patents are poorly indexed; foreign language patents may be missed; continuation applications may claim different subject matter than the parent; PRIOR-ART / INVALIDITY BLIND SPOTS: an FTO search does not evaluate whether the blocking patents are VALID; even patents with valid claims may be unenforceable or invalid; a blocking patent may be challengeable via IPR or ex parte reexamination — but the FTO analysis itself typically does not investigate this unless specifically requested; NEWLY ISSUED PATENTS: an FTO clearance provides a snapshot in time; new patents issue daily; a product that was clear at launch may face blocking patents that issued after the clearance analysis; regular updates are advisable for long product lifecycles; DESIGN-AROUND ANALYSIS: a clearance showing a blocking claim does not automatically mean the product must be redesigned; sometimes minor design changes (design-around) can eliminate infringement risk; the FTO analysis should identify design-around options where possible; JURISDICTIONAL LIMITS: an FTO in the US provides no assurance for European, Chinese, or other markets; global products need jurisdiction-specific FTO analysis; a patent may be expired in the US but still valid and blocking in Germany.

One of the most important functions of an FTO clearance is to create a record that reduces willful infringement exposure: WILLFUL INFRINGEMENT BACKGROUND: Halo Electronics, Inc. v. Pulse Electronics, Inc. (S.Ct. 2016): willful infringement requires that the defendant's conduct was 'wanton, malicious, and bad-faith'; the focus is on the defendant's SUBJECTIVE knowledge and intent; courts may treble damages and award attorney fees for willful infringement; OPINION OF COUNSEL: 35 U.S.C. § 298: reliance on an opinion of counsel may be offered as evidence supporting non-willfulness; if the company obtained a written FTO opinion from qualified patent counsel BEFORE beginning potentially infringing activity, this is strong evidence of good-faith non-willfulness; OPINION REQUIREMENTS FOR PROTECTION: (1) TIMELY: obtained before or shortly after learning of the relevant patent; (2) COMPETENT: prepared by a qualified patent attorney with a reasonable analysis; (3) GOOD FAITH RELIANCE: the company actually relied on the opinion — not just hired counsel to create a paper defense; PRIVILEGE IMPLICATIONS: in patent litigation, defendants who rely on an opinion of counsel as a defense to willfulness must produce that opinion to the plaintiff (waiving privilege for that opinion); careful privilege planning is required; MODERN STANDARD: after Halo, the 'enhanced damages' standard is more subjective; a credible FTO opinion is still important but does not categorically eliminate willfulness if other evidence shows bad faith or recklessness.

When an FTO analysis identifies a potentially blocking patent, the company has several strategic options: OPTION 1 — NON-INFRINGEMENT ARGUMENT: review whether the claim actually reads on the product; consider: (a) if a claim element is missing from the product, there is no infringement; (b) if the accused product does not use the claimed 'means,' there may be no literal infringement; narrow claim construction may defeat the infringement reading; OPTION 2 — DESIGN AROUND: modify the product to avoid the claim; remove or substitute a feature that triggers infringement; design-around is preferable to a license when the patented feature is not essential to the product's value; OPTION 3 — LICENSE: obtain a license from the patent owner; licenses may be available even from competitors; licensing avoids the cost and uncertainty of litigation; OPTION 4 — CHALLENGE THE PATENT'S VALIDITY: if the blocking patent has a weak claim, the company can: file an IPR petition (if within 1 year of complaint), otherwise seek ex parte reexamination; challenge validity in litigation as a counterclaim; earlier invalidity challenges are generally cheaper than later litigation; OPTION 5 — WAIT FOR EXPIRATION: if the blocking patent is near expiration, delay launch (costly) or accept the risk of an enforcement action for a short period; OPTION 6 — PROCEED WITH CALCULATED RISK: in some markets, the patent owner may not enforce; small entities or NPEs focused on other defendants may never target this company; infringement damages are bounded by the commercial sales made; OPTION 7 — CROSS-LICENSE: if the company has patents the blocking patentee might want, a cross-license can avoid cash royalties while clearing the path to market.