You've found it. A competitor's product uses your patented technology — same mechanism, same architecture, same implementation — and they didn't license it from you. The question now isn't whether infringement is happening. It's what you do next.
This is where most patent holders make their most expensive mistakes. Some panic and send a cease-and-desist letter before consulting an attorney, triggering a declaratory judgment lawsuit. Others freeze — overwhelmed by the complexity — and wait so long that their enforcement options narrow. Neither is the right move.
The fundamental rule: Don't panic, but don't wait. You have time to act strategically — and that time is worth using. But every month of delay is a month of infringement the court may not compensate you for. Move deliberately, not recklessly.
What follows is a concrete action plan — the steps you take from the moment you suspect infringement to the moment you hand a solid evidence package to an IP attorney.
Step 1: Don't Make Contact Yet
The single most important thing to do in the first 24 hours is nothing external. Do not email the company. Do not call their CEO. Do not post about it on LinkedIn. Do not send any communication that could be interpreted as an accusation of infringement.
Here's why this matters: an informal, unsupported accusation of infringement can trigger a declaratory judgment action. The accused infringer sues you — in a court of their choosing — to have your patent declared invalid or not infringed. Once that happens, you've lost control of the venue, the timeline, and potentially your negotiating position. Courts have allowed this based on nothing more than an email expressing "concern" about a competitor's product.
Before any external contact: Consult a patent attorney. This applies to cease-and-desist letters, licensing inquiries, "friendly" phone calls, and social media comments. An attorney's first job is to make sure you don't inadvertently compromise your own case before it begins.
What you do in those first hours: start documenting.
Step 2: Document Everything — Systematically
Evidence has a short shelf life. Infringers update their websites, modify product specs, and delete documentation the moment they sense they're being watched. Your first active step is to preserve everything you can find, now, with timestamps.
What to capture right now:
- Full-page screenshots of the product pages, feature descriptions, and technical specs — with the browser URL and date visible in the screenshot
- PDFs of any downloadable spec sheets, white papers, or user manuals
- Video captures of product demos or feature walkthroughs
- Archived web snapshots via web.archive.org — submit the URLs manually so you control the archive date
- Any patent applications the infringer has filed (search USPTO.gov by assignee name)
- Press releases, conference presentations, or technical blog posts describing the product
If it's practical to purchase the product, do so. A purchased unit provides direct physical evidence of the infringing implementation — and your purchase receipt establishes the date.
Save locally AND to a cloud storage service. Include folder names with the date (e.g., CompanyName_Evidence_2026-05-01). This creates a clear audit trail that's admissible in litigation.
Your patent's independent claims are the legal boundary of your protection. For infringement to exist, the accused product must practice every element of at least one independent claim. Start building that case now.
For each independent claim in your patent:
- Break it down into individual elements (limitations) — write each one out as a separate line
- For each element, find specific product evidence that demonstrates the accused product practices that element
- Note the source of that evidence (specific URL, page number in a spec sheet, timestamp in a demo video)
- Flag elements where you're uncertain — these are the questions for your attorney
This element-by-element mapping is the foundation of your infringement case. For a detailed walkthrough of the claim comparison process, see our guide: How to Detect Patent Infringement: A Step-by-Step Guide.
PatentRadar's AI claim parser automatically extracts claim elements and maps them against target products or patent filings — generating a structured comparison with confidence scores you can hand directly to an attorney.
Step 3: Assess the Scope
Before you decide what to do, you need to understand what you're dealing with. Infringement that covers a single product from a small startup is a very different situation from systematic copying by a publicly traded company entering your core market.
Ask these questions to size the problem:
- How many products are involved? One SKU or their entire product line?
- How long has this been going on? Check the earliest product pages you can find — archived versions, press coverage, LinkedIn posts. Every month of infringement is potentially recoverable in damages.
- What's their revenue exposure? A public company's 10-K shows product revenue. For private companies, estimate from employee count, funding rounds, and pricing. This determines whether enforcement economics make sense.
- Domestic or international? U.S. patents only cover infringement occurring within the United States. If the infringer manufactures abroad and imports into the U.S., you may have an ITC complaint option in addition to district court.
- Are other patents involved? If you have a patent portfolio, check whether multiple patents cover the infringing product. More claims = more leverage in any negotiation.
This scope assessment directly shapes which enforcement option makes sense. A high-value infringer with systematic copying justifies litigation economics. A low-value infringer with a single infringing feature may only warrant a licensing conversation.
Step 4: Evaluate Your Enforcement Options
Patent enforcement isn't binary — it's not "sue them or do nothing." You have four main options, each with different costs, timelines, and outcomes. Here's the breakdown:
| Option | What It Is | Typical Cost | Timeline | Best For |
|---|---|---|---|---|
| Cease & Desist Letter | Formal demand to stop infringing, sent by your attorney | $1,500–$5,000 in legal fees | 1–3 weeks to send; infringer has 30–60 days to respond | Opening move; signals seriousness; creates a record |
| Licensing Negotiation | Grant a license in exchange for royalties, often initiated by the C&D | $10,000–$50,000 in legal fees | 3–12 months for a deal; can be expedited | Infringer has ongoing commercial value; you want recurring revenue |
| Federal Litigation | Patent infringement lawsuit in U.S. district court | $500,000–$3,000,000+ through trial | 18 months–4 years (most settle in 12–18 months) | High-value infringement; infringer refuses to negotiate |
| ITC Complaint | International Trade Commission complaint to block imports | $500,000–$2,000,000 | 15–18 months to a final determination | Infringer manufactures outside the U.S. and imports; fastest path to exclusion orders |
A few things to understand about these options:
They're not mutually exclusive. Most enforcement campaigns start with a C&D, move to licensing negotiation, and only escalate to litigation if the infringer refuses reasonable terms. Very few cases actually go to trial — the cost on both sides creates strong incentive to settle.
Contingency arrangements exist. Some IP litigation firms take patent cases on contingency — they only get paid if you win. This is more common for high-value cases with clear infringement. If upfront litigation costs are prohibitive, ask about contingency structures during your attorney consultation.
Demand letters carry risk. A poorly drafted C&D can backfire — triggering a declaratory judgment action in a court chosen by the infringer, often their home district. This is why attorney involvement before any external contact is non-negotiable.
Step 5: Decide When to Hire a Patent Attorney
The short answer: before you do anything external. The longer answer involves understanding what kind of help you need and when.
A patent attorney reviews your claim mapping and gives you a legal opinion on whether the accused product infringes. Flat-fee opinions run $500–$1,500 at many firms. This tells you whether you have a viable case before you commit to any strategy. Bring your evidence package — a well-organized package cuts the attorney's time significantly.
If the preliminary opinion confirms strong infringement, bring the attorney in fully — they'll review your complete evidence, assess litigation risk, evaluate the infringer's potential invalidity defenses, and recommend an enforcement approach. This is also when you discuss whether a C&D makes sense as a first move or whether you go straight to licensing negotiation.
No emails. No calls. No LinkedIn messages. No conference conversations where you "casually mention" you've noticed their product. Any of these can compromise your legal position or trigger a preemptive declaratory judgment action. The attorney sends the first communication, under privilege, on your behalf.
If someone accuses you of infringing their patent — even informally — you need attorney involvement before responding. Do not acknowledge, deny, or engage. Patent holders sometimes send accusatory letters hoping for a quick settlement from defendants who don't realize the weakness of the claim. An attorney assesses the actual risk before you say anything.
How to find the right attorney
Look for IP attorneys who specialize in your technical field. A patent attorney who understands software architecture handles software patent cases more efficiently than a generalist — both in prosecution and in litigation. Ask about their experience with similar technology, their typical contingency terms (for larger cases), and their flat-fee preliminary opinion rates. Most offer free 30-minute initial consultations.
How Monitoring Prevents This From Becoming a Crisis
There's a significant difference between discovering infringement after six months and discovering it after two years. The difference isn't just financial — it's strategic.
Early detection means:
- The infringer hasn't built their entire business on your technology yet — they're easier to negotiate with
- Evidence is fresher and more accessible — product pages haven't been modified, documentation is still available
- You have more enforcement options — including injunctive relief before the infringer becomes too entrenched
- Damages aren't capped by delayed discovery arguments — courts are more willing to award full damages when you acted promptly
- Less psychological pressure — you're not in crisis mode, you're acting strategically
The challenge is that consistent manual monitoring — periodic USPTO searches, Google Alerts, competitor scans — is unsustainable for most inventors. It requires regular time investment, and most people let it slip. Infringement that surfaces during those gaps goes undetected for months or years.
Automated monitoring tools like PatentRadar run daily claim-level scans against new patent filings and product databases. When a potential match appears, you get an alert with the evidence pre-packaged — the element comparison, the relevant product documentation, the confidence score. You're seeing infringement when it's three months old, not three years old.
For an overview of your monitoring options and how they compare on cost and coverage, see How to Monitor Your Patents for Infringement in 2026. For the complete detection process from suspicion to documented case, read How to Detect Patent Infringement: A Step-by-Step Guide.
Bottom line: Discovering infringement isn't the emergency — discovering it years too late is. Act on your documentation, assess scope, get a preliminary attorney opinion, and let the evidence guide which enforcement path makes sense. The inventors who recover the most from infringement are the ones who caught it early and acted methodically, not the ones who reacted emotionally.
Stop infringement before it scales
PatentRadar monitors your patents daily — scanning new filings and product databases against your claim elements. Catch infringement when it's weeks old, not years old. Evidence pre-packaged for attorney review.