Patent Infringement Lawsuits

1) Introduction: What is Patent Infringement and Why is it Critical?

In Turkey , patent and utility model certificates grant the inventor a monopoly right for a specified period. This right protects against unauthorized production, use, sale, offering for sale, import, or commercial possession of the product or method covered by the invention. In a significant portion of disputes, the conflict hinges on discussions of the scope of claims and equivalence . In practice, the issue for the patent holder is not only stopping the infringement but also protecting market share, price levels, and R&D investment . Therefore, a swift, evidence-based, and precautionary strategy makes a significant difference.

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2) Legal Framework: Scope and Competent Courts

• Source of Protection: No. 6769 on Industrial Property (IPP) and secondary legislation; compliance with EPC and TRIPS principles at the international level.

• Determining the Scope: The scope of protection by the claims ; descriptions and drawings guide interpretation. The principle (doctrine) of equivalence is accepted in Turkish practice: elements that perform the same function in the same way and achieve the same result equivalent .

• Competent Court: Intellectual and Industrial Property Rights Courts (IPRC); where these do not exist, the Commercial Courts of First Instance. Jurisdiction also depends on the defendant's place of residence and the infringement occurred/caused its effect .

• Statute of limitations: Claims for compensation arising from infringement are generally 2 years (before knowledge) and in any case 10 years under the tort regime ; for claims for prevention and refusal , the legal interest exists for the duration of the violation.

• Criminal Aspects: Unlike trademarks, patent infringement is not generally tied to a specific type of crime; protection is primarily private law means.

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3) Types of Lawsuits and Claims: “Determination – Injunction – Removal – Compensation – Transfer of Earnings”

3.1. Detection of Rape

The court's finding of "the existence of a violation" lays the groundwork for subsequent injunctions and compensation . The finding is particularly important in practice if there is a possibility of further violations

3.2. Prevention (Stopping) of Rape

The aim is to immediately end ongoing or likely recurring violations . Measures such as halting production, sales, imports, advertising and promotion , and preventing the release of stocks to the market are stipulated.

3.3. Elimination of Consequences (Ref'i)

• counterfeit products , destruction , or transfer of ownership (for a fee, if appropriate).

• The fate of the breach tools (mold, matrix, software module, special apparatus, etc.).

• Obligation to provide information: Requests for the disclosure of information regarding the offender's production and distribution channels and inventory (accountability).

3.4. Material and Moral Compensation and Transfer of Earnings

• actual loss (lost profit) or transfer of ill-gotten gains .

• in damage assessment include price erosion, loss of market share, and licensing fee-based (reasonable royalty) calculations.

• In practice, the court examines sales volumes, profitability, unit economics, and comparative price trends through expert opinions. Claims for moral damages, damage to commercial reputation, or erosion of reputation may arise in exceptional circumstances.

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4) Evidence Strategy: Evidence Gathering, Provisional Measures, and Technical Examination

4.1. Gathering Evidence (Code of Civil Procedure, Articles 400 et seq.)

When there is suspicion of rape , evidence gathering before or during the trial is critical to prevent the loss of valuable evidence such as reports, protocols, product samples, production line images, and device firmware versions . On-site investigations, photo and video recordings, hashed digital outputs, firmware dumps, and product teardown reports are practically effective.

4.2. Interim injunction

• before or during . The three key elements are "clear indications of a breach, irreparable harm, and a likelihood of justification."

• Measures such as halting production, seizing inventory, preventing advertising, listings, exports/imports, and removing/blocking access to content on online marketplaces

• Collateral is determined in practice; proportionality and market freedom – competition sensitivities are taken into consideration.

4.3. Expert Opinion and Inspection

A technical reading of the patent text, claims interpretation, equivalent elements , and prior technical analysis typically requires a multidisciplinary panel of experts. Strategy: provide the expert with clear, concrete, limiting questions; claim charts and item-correspondence tables.

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5) Claims Comments, Equivalence, and the “All Elements” Approach

• All elements rule: In a claim of infringement, every element must be met in the product/method; if any element is missing, direct infringement .

• Equivalence principle: An element that appears missing can be considered equivalent if it performs the same function in essentially the same way and with the same result ; in this case , indirect/equivalent infringement is discussed.

• Explanations and drawings: The claim interpretation the explanations and drawings ; however, that would unfairly expand are avoided (respecting the balance of public disclosure).

• Prosecution history estoppel debates: Although not absolutely binding in Turkey, recourse clauses and the narrowed elements of the claim in the application process can be taken into account in the interpretation.

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6) Industrial Applicability, Novelty, and Inventive Step: Defense of Invalidity

One of the strongest defenses in an infringement case is the assertion of the patent's invalidity . The invalidity claim can be filed as a separate lawsuit ; it can also be requested to be made a preliminary issue in the infringement case . Reasons:

• Lack of innovation: Previous technology (patents, scientific publications, catalogs, open source code, trade fair presentations).

• Lack of inventive step: Obviousness to the expert; claims of combination with a problem-solving approach.

• Lack of clarity: If there is insufficient explanation for implementation, the protection becomes ineffective.

• Reasons include irrelevance/violation of public order/morality , and exceeding the limits of requirements

• Partial invalidation: Some claims are rejected, while the remaining claims are protected.

Practice: Construct your argument for invalidity chronologically : oldest prior technique → closest document → defining the technical problem → differences → “chain of obviousness”. Concretize the problem-solution narrative to guide the expert

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7) Defenses: Prior Use, Compulsory License, Bolar/Experiment Exception

• Prior use right: A person who , in good faith, has started using the product in Turkey or made substantial preparations before filing a patent application , may continue to use it within the same scope

• Compulsory licensing: This can be invoked in exceptional circumstances; such as in cases of public interest, dependent patents, or non-use.

• Experimentation and Bolar exception: Experimental studies, particularly those related to drug licensing processes , do not constitute a violation under the Bolar exception ; experiments and productions required for applications to licensing authorities are not considered a violation

• Exhaustion principle: If a patented product has been placed on the market in Turkey by the rights holder or with their permission, resale/distribution of that specific product does not constitute infringement (unless there is remanufacturing).

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8) Pre-Litigation Steps: Warning Letter, Negotiation, and Mediation

• Notice: Detail the technical and legal framework with a claim chart and leave the door open for a friendly resolution ; otherwise, avoid providing material for a malicious defense

• Mediation: Since intellectual and industrial property disputes can have the nature of commercial litigation , mandatory mediation may be applied in disputes involving monetary claims . However, to avoid delaying the provisional injunction, the application should be processed in parallel .

• NDA and supervised inspection: If product samples or prototypes are to be shown to the other party, a confidentiality agreement and limited sharing arrangement are required.

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9) Litigation Strategy: Speed, Focus, and Moderation

1. Expediting: Evidence gathering + precautionary measures same day/week; online removal requests, customs stoppage (see below).

2. Focus: One or two of the strongest demands and their clear violation; starting with highly accurate demands rather than opening all demands to debate.

3. Proportionality: Claims exceeding demand increase collateral risk; market realities and competition law must be considered.

4. Financial model: Compensation consisting of a reasonable license fee + lost profit + price erosion; alternatively, turnover.

5. Chain of evidence: Product supply flow, invoice-delivery note-ERP reports, inventory counts, HS code-based import data, internet archives (WBM outputs), technical teardown.

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10) Compensation Calculation: Methods and Tips

• A reasonable licensing fee approach considers: comparable licensing rates in the same sector; technology maturity level; geographic and sectoral coverage; and royalty base (revenue or gross profit).

• Lost profit: “But-for” analysis (assumption that there would have been no breach); production capacity, demand elasticity, channel strength.

• Price erosion: Decrease in the reference price due to a breach ; price difference after breach × quantity .

• Transfer of profit: Transfer of the defendant's profit from the breach; accounting records + expert opinion.

• Interest and exchange rates: Commercial litigation interest; valuation date in foreign currency transactions; difference calculation method.

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11) Indirect Infringement, Liability of Intermediaries and Digital Platforms

• Indirect infringement: When those supplying the essential elements of the patented method knowingly provide these elements in a manner specifically designed to infringe upon them

• Intermediaries: Suppliers, logistics, subcontractors; "knowing/foreseeing the violation" and continuing despite warnings.

• Digital platforms: Listing responsibilities, notice-and-takedown procedures, repeat infringement policies; require finer finesse than trademarks , but courts are increasingly open to removal/blocking orders in patent cases as well

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12) Customs Detention and Border Measures

The patent holder can apply to the Customs administration to request a halt to suspicious imports. In practice, a file containing the patent number, a summary of the claim, the risky HS code, a photo-drawing, and distinctive technical specifications is effective. A very rapid reaction (measure/lawsuit) is necessary when a notification is received from Customs

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13) The Fine Line Between Utility Models and Patents

An inventive step is not required for a utility model ; however, novelty and industrial applicability are applicable. The infringement architecture is similar; however, novelty and clarity are discussed more than "obviousness" in invalidity defenses. The risk of invalidation should be incorporated into the strategy.

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14) Implementation Steps: Checklist

1. Documentation and Timeline: Patent/utility model certificate, claims set, recourse clauses, possible continuation/additional applications; onset, intensity, and geographical scope of the infringement.

2. Market Map: Sales channels, price, campaigns-advertising, supply chain.

3. Technical Review: Sample collection, teardown, claim chart, equivalence assessment.

4. Fast Tools: Evidence gathering, precautionary measures, customs , and online removal.

5. Communication Strategy: Warning – negotiation – mediation (if necessary).

6. Case Packages: Determination – injunction – revocation – compensation/transfer of earnings; information and destruction .

7. Defense Proposals: Invalidity, prior use, Bolar/experimental exception, exhaustion.

8. Financial Model: Alternative transfer of losses/royalties/profits; collateral capability.

9. Enforcement – ​​Implementation: Execution of the decision, mechanisms for increasing penalties in case of repeated violations.

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15) Common Mistakes and Suggested Solutions

• an overly broad interpretation of the claim: the judge and expert witness proportionality and public transparency ; base your technical comparison on a concrete, element-by-element basis.

• Weakness in evidence: Instead of generalizations like "everyone knows," the sample-invoice-log-report level.

• Incorrect market comparisons: License/royalty peers technology level and usage intensity .

• Delay in taking action: Once the market adjusts the price/perception level to a new equilibrium, later .

• The one-case-many-claims confusion: It is often more effective to first create an "anchor" decision with the strongest claim and the most obvious outcome

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16) Concrete Scenarios

Scenario A: Mechanical Part – Equivalence

The patented component A+B+C elements. The competitor A+B+C' (a different material or geometric variation).

• Approach: Claim chart describing the equivalence of C to C using the function-path-result triad + engineering analysis + performance tests.

• Measure: Inspection of the production line and inventory assessment .

• Compensation: Price erosion + reasonable licensing fee.

Scenario B: Software-Method Patent

Requests involve a method and system modules that execute that method. The competitor breaks down the function in its microservice architecture .

• Approach: A technical report that presents functional modules through data flow and call graphs

• Caution: Access to the source code is generally not possible; however, logs, API endpoints, behavioral testing , and result equivalence .

• Defense: Clarity and feasibility objections; publicly available arxiv/whitepapers.

Scenario C: Drug-Bolar Exception

The competitor says it is conducting experimental production for its licensing application.

• Approach: Boundaries of the exception : quantity, intended use, is there commercial supply?

• Precaution: non-clinical commercial samples and marketing indications are available.

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17) Decision Implementation and Compliance Programs

• Destruction/Removal: The court decision the timeframe and procedure .

• Compliance commitment: Obtaining a commitment from the defendant that they will not repeat the breach ; settlement agreements involving high contractual penalties in case of repeated breaches

• Monitoring: Periodic scanning and logging of evidence on marketplaces and online channels

Conclusion: How to Build an Effective Patent Infringement Strategy?

• Speed ​​is the priority: Evidence gathering, precautionary measures, and customs triad.

• Technical accuracy: Claims-oriented, element-by-element comparison; equivalence testing.

• Financial realism: Alignment of loss and royalty accounts with the business model.

• Defensive prediction: Invalidity, prior use, Bolar, exhaustion.

• Enforcement focus: Implementing the decision, rebalancing the market, and preventing recurrence.