--- title: "Patent enforcement & infringement response | GTC" description: "Attorney-led patent enforcement: cease-and-desist letters, administrative cancellation and invalidation actions, and licensing settlements." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Organization", "name": "Global Trademark Company LLC", "url": "https://globaltrademarkcompany.com", "logo": "https://globaltrademarkcompany.com/gtc-logo.svg", "description": "Multi-practice IP and business legal firm. Trademarks in 100+ jurisdictions, patents in 10 + PCT, copyrights under Berne. Operating since 2016.", "foundingDate": "2016", "sameAs": [ "https://www.linkedin.com/company/globaltrademarkcompany/", "https://www.trustpilot.com/review/globaltrademark.co" ], "contactPoint": [ { "@type": "ContactPoint", "telephone": "+1-510-973-4964", "contactType": "customer service", "areaServed": "US", "availableLanguage": [ "English" ] }, { "@type": "ContactPoint", "telephone": "+44-7453-347853", "contactType": "customer service", "areaServed": "GB", "availableLanguage": [ "English" ] }, { "@type": "ContactPoint", "telephone": "+91-6397-329955", "contactType": "customer service", "areaServed": "IN", "availableLanguage": [ "English", "Hindi" ] } ], "address": [ { "@type": "PostalAddress", "streetAddress": "712 H Street NE, Suite 2094", "addressLocality": "Washington", "addressRegion": "DC", "postalCode": "20002", "addressCountry": "US" }, { "@type": "PostalAddress", "streetAddress": "YSC Complex, 4th floor, A-400, 12 Ajit Singh House, Sri Aurobindo Marg", "addressLocality": "New Delhi", "addressRegion": "Delhi", "postalCode": "110016", "addressCountry": "IN" } ] }, { "@context": "https://schema.org", "@type": "Service", "name": "Patent Enforcement", "serviceType": "Patent Enforcement and Infringement Response", "description": "Attorney-led patent enforcement: cease-and-desist letters, administrative cancellation and invalidation actions, and licensing settlements.", "provider": { "@type": "LegalService", "name": "Global Trademark Company", "url": "https://globaltrademarkcompany.com" }, "offers": { "@type": "Offer", "description": "Flat fee per engagement phase, quoted in writing before any work begins." } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://globaltrademarkcompany.com/" }, { "@type": "ListItem", "position": 2, "name": "Patents & Designs", "item": "https://globaltrademarkcompany.com/services/patent-filing" }, { "@type": "ListItem", "position": 3, "name": "Patent Enforcement", "item": "https://globaltrademarkcompany.com/services/patent-enforcement" } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Does GTC represent me in court?", "acceptedAnswer": { "@type": "Answer", "text": "No. GTC handles the prosecution and administrative side. Cease-and-desist correspondence, administrative cancellation and invalidation actions at the patent office, and licensing settlements. When a dispute requires a court filing or a hearing before a judge, we coordinate local litigation counsel qualified to appear in that court and work alongside them." } }, { "@type": "Question", "name": "What is an administrative cancellation or invalidation action?", "acceptedAnswer": { "@type": "Answer", "text": "It is a proceeding filed at the patent office, not a court, asking the office to cancel or invalidate a granted patent, for example inter partes review and post-grant review before the USPTO board, opposition at the EPO, or invalidation at CNIPA. It is the standard administrative route to challenge a patent's validity, and the office decides the result." } }, { "@type": "Question", "name": "Is there a deadline to act?", "acceptedAnswer": { "@type": "Answer", "text": "Often yes. Some routes have hard windows. The EPO allows opposition only within nine months of the grant being published, and post-grant review before the USPTO board has its own filing window after issuance. Other routes, such as a cease-and-desist letter or an inter partes review, have different timing. We flag any deadline that applies to your matter on the first call." } }, { "@type": "Question", "name": "Can you guarantee the infringer will stop, or that the patent will be cancelled?", "acceptedAnswer": { "@type": "Answer", "text": "No. No firm can. Whether an accused party stops, settles, or fights is their decision, and whether an administrative action succeeds is decided by the patent office or tribunal on the evidence. We give you a candid read on the strength of the claim chart and the realistic options, then do the procedural work to the standard the office expects." } }, { "@type": "Question", "name": "What does a cease-and-desist letter actually do?", "acceptedAnswer": { "@type": "Answer", "text": "It puts the other party on formal notice of your granted patent and the conduct you say infringes it, and it opens a channel to resolve the matter, often through a licence or a coexistence agreement, before any tribunal or court is involved. Sent on a real claim-by-claim read rather than a template, it carries more weight and is less likely to draw a validity counter-attack." } }, { "@type": "Question", "name": "I received a cease-and-desist letter. Can you help me respond?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. We assess the claim against you, analyse whether your product falls within the granted claims, check the asserted patent's validity, and prepare a response, which may be a rebuttal, a design-around plan, an invalidation petition at the office, or settlement talks, depending on what the analysis shows." } } ], "dateModified": "2026-08-28" } ] --- [![](/branding/logos/gtc-logo-stacked.svg)![](/branding/logos/gtc-logo-stacked-white.svg)](/) - Trademarks - Patents - Copyrights - Data Privacy - Business Legal - [Pricing](/pricing) - Resources - Company Sign inEN · USD Sign in 1. [Home](/) 2. › 3. [Patents & Designs](/services/patent-filing) 4. › 5. Patent enforcement Infringement response + administrative action # Someone is using your patented invention. Respond the right way. We assess the infringement, send or respond to cease-and-desist letters, and file administrative cancellation or invalidation actions at the patent office. When a matter heads to court, we coordinate local litigation counsel. GTC handles the prosecution and administrative work. From $2,500 , scoped and quoted in writing before any work. [Start an Enforcement Review](/forms/catalog/patents-designs/patent-enforcement?ref=b2c) [Excellent ![](/branding/trustpilot/stars-4.5.svg)Trustpilot ](https://www.trustpilot.com/review/globaltrademark.co) ![GTC patent attorney preparing an infringement response and cease-and-desist letter](/img/home/hero-library/m-tm-amazon-brand-480.jpg) Infringement mapped Evidence gathered Action taken C&D to litigation Rights enforced Damages pursued ![](/assets/rajat-DY_holn9.webp)![](/assets/maryam-DlkVg4RT.webp)![](/assets/snehaja-WDgbdU0E.webp) Legal team GTC's patent team Patent counsel ![](/assets/rajat-DY_holn9.webp)![](/assets/maryam-DlkVg4RT.webp)![](/assets/snehaja-WDgbdU0E.webp) Legal team GTC's patent team Patent counsel 1,612+ patents 10,924+ clients 11 attorneys 10+ years IIPLA Top IP Consultancy 2026 [Upwork · Top Rated Plus ](https://www.upwork.com/freelancers/zamanzaidi) Trusted by founders and brands worldwide ![Atlys](/assets/atlys-B5BookJo.webp "Atlys")![Perfora](/assets/perfora-D4_346Y2.webp "Perfora")![Soxco](/assets/soxco-D31kWMAz.webp "Soxco")![BossCare](data:image/webp;base64,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 "BossCare")![Innovist](/assets/innovist-BgYdG_yd.webp "Innovist")![Bacardi](/assets/bacardi-JU27gvk6.webp "Bacardi")![Footcare Lab](/assets/footcarelab-BLfB0WJu.webp "Footcare Lab")![Bare Anatomy](/assets/bare-anatomy-CBhgu9Ro.webp "Bare Anatomy")![Freedom](/assets/freedom-confectionery-HioHiGYc.webp "Freedom") How it works ## Three steps to a considered response. 1 ### Free assessment call 30 minutes. You describe the dispute. Your patent, the product or party involved, and what you want to achieve. We confirm whether enforcement is the right path and scope the work. 2 ### Claim-chart and strategy A practitioner maps your granted claims against the accused product or the patent you want challenged, then recommends a route: a demand letter, an administrative action at the office, or coordination with litigation counsel. 3 ### Action filed or letter sent We send or respond to the cease-and-desist correspondence, file the administrative cancellation or invalidation petition, or open licensing-settlement talks, with every step documented in your portal. What it costs ## Priced by engagement phase. Patent Enforcement starts from $2,500. Patent enforcement is scoped to the dispute, so every engagement is quoted in writing after the free assessment call. The anchor below reflects a typical opening phase, an infringement assessment with a claim chart and a cease-and-desist letter. Administrative actions and settlement work are quoted separately once the route is chosen. You approve each phase before it starts. What's included - Free 30-min assessment call before any work begins - Claim chart mapping your granted claims to the accused product - Cease-and-desist letter drafted, or a received letter assessed and answered - Validity review of the asserted or target patent - Administrative cancellation / invalidation petition prepared and filed (quoted per action) - Licensing and settlement negotiation, with the agreement drafted - Local litigation counsel coordinated when a matter reaches court - Every step documented in your client portal Infringement assessment + claim chart From $2,500 Cease-and-desist letter (drafted or response) Quoted after assessment Administrative cancellation / invalidation action Quoted per action Licensing-settlement negotiation + drafting Quoted by scope Official patent-office fees for an administrative action, and any local litigation-counsel fees, are billed separately at cost and confirmed before filing. Get started ### Start an enforcement review Tell us about the dispute. Your patent and the product or party involved, and a patent attorney will assess the infringement and lay out your options. If you are facing a deadline, such as a post-grant opposition window, note it here so we can prioritise the review. [Start Now](/forms/catalog?subcategory=patent-enforcement&ref=b2c) Why GTC ## Enforcement handled by people who prosecute patents. ![](/assets/rajat-DY_holn9.webp)![](/assets/maryam-DlkVg4RT.webp)![](/assets/snehaja-WDgbdU0E.webp) Legal team GTC's patent team Patent counsel Attorney-led prosecution ### Claim-by-claim analysis Before any letter goes out, a practitioner charts your granted claims against the accused product. A demand built on a real infringement read carries weight; a vague threat invites a counter-attack on validity. ### Administrative actions We file cancellation and invalidation petitions directly at the patent office. Inter partes and post-grant review, EPO opposition, CNIPA invalidation, and the equivalent procedures elsewhere. These are tribunal proceedings before the office, not court cases. ### Settlement and licensing Most disputes resolve without a tribunal. We negotiate cease-and-desist outcomes, coexistence terms, and licensing settlements, then paper the agreement so the resolution holds. ### Coordinated across offices Patents are territorial, so enforcement is too. We run the administrative side across the major patent offices and coordinate local litigation counsel wherever a court filing is required. Your Customer Success Team ## A dedicated team that owns your matter from start to finish. Every GTC client gets a dedicated Account Manager and a Senior Account Manager who learn your business and stay with you from first email to final filing. They are named people who pick up the phone and already know your matter, so every step moves forward without delay. ### Your Account Manager Your day-to-day point of contact, who coordinates every matter, keeps things moving, and already knows your file. They have your full history, so you start every conversation where the last one left off. ### Your Senior Account Manager Senior oversight on strategy and escalations, stepping in as your needs grow, so every important detail stays on track. A named person, on email or a call, at every step. ![Your dedicated GTC Customer Success Team](/assets/m-onboarding-bright-welcome-C-heDolY.jpg) How we compare ## Responding to infringement? Here's how GTC works. What you get GTC Online filing services Doing it yourself Claim chart mapping granted claims to the accused product Administrative cancellation / invalidation filed at the patent office Cease-and-desist drafted by a registered patent practitioner Licensing-settlement negotiation and agreement drafting Local litigation counsel coordinated when a matter reaches court Generic demand-letter templates Claim chart mapping granted claims to the accused product GTC Online filing services Doing it yourself Administrative cancellation / invalidation filed at the patent office GTC Online filing services Doing it yourself Cease-and-desist drafted by a registered patent practitioner GTC Online filing services Doing it yourself Licensing-settlement negotiation and agreement drafting GTC Online filing services Doing it yourself Local litigation counsel coordinated when a matter reaches court GTC Online filing services Doing it yourself Generic demand-letter templates GTC Online filing services Doing it yourself The timeline ## From assessment call to a filed action or sent letter. Enforcement timelines depend on the route you choose and the office's own calendar. Here is how a typical engagement breaks down, and where the decision points sit. 1. Day 1. Free ### Assessment call You describe the dispute. We confirm whether enforcement fits, flag any pressing deadline such as a post-grant opposition window, and scope the work in writing. 2. Week 1–2 ### Claim chart and strategy A practitioner charts the granted claims against the accused product or the target patent and recommends a route. Demand letter, administrative action, or litigation-counsel coordination. 3. Week 2–4 ### Letter sent or petition filed We send or respond to the cease-and-desist correspondence, or file the cancellation or invalidation petition at the office. Strict post-grant deadlines, such as the EPO's nine-month opposition window, are calendared and met. 4. Ongoing ### Office proceeding or settlement Administrative proceedings run on the office's schedule, often over many months. Where talks open, we negotiate licensing or coexistence terms and paper the settlement. The office or tribunal decides any contested outcome. In their words ## All your legal, in one place. One accountable team across every practice, operating since 2016. [Excellent ![](/branding/trustpilot/stars-4.5.svg)Trustpilot ](https://www.trustpilot.com/review/globaltrademark.co) 1,612+ Patents prosecuted 10,924+ Clients served 11 In-house attorneys 10+ Years since 2016 Patent Enforcement FAQ ## Frequently asked questions Does GTC represent me in court? No. GTC handles the prosecution and administrative side. Cease-and-desist correspondence, administrative cancellation and invalidation actions at the patent office, and licensing settlements. When a dispute requires a court filing or a hearing before a judge, we coordinate local litigation counsel qualified to appear in that court and work alongside them. What is an administrative cancellation or invalidation action? Is there a deadline to act? Can you guarantee the infringer will stop, or that the patent will be cancelled? What does a cease-and-desist letter actually do? I received a cease-and-desist letter. Can you help me respond? [Start an Enforcement Review](/forms/catalog/patents-designs/patent-enforcement?ref=b2c) Related patent services ## Enforcement connects to the rest of your patent strategy. [ ### Patent licensing Turn a dispute into revenue. Licence the patented technology on terms we negotiate and draft. See licensing ](/services/patent-licensing)[ ### Freedom-to-Operate Before you launch or respond, find out whether your product clears live patents in your market. See FTO ](/services/freedom-to-operate) Get a candid read before you send a single letter. ## Ready when you are. A free assessment call. We'll talk through the dispute, flag any deadline, and lay out the routes. Demand letter, administrative action, or litigation-counsel coordination, with the fee scoped in writing before any work begins. 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