# Draft Answer Counterclaims Patent > Complete responsive pleading for a patent infringement defendant, comprising answer, affirmative defenses, and counterclaims, grounded in technical facts, prior art analysis, and the pleadings record. - Skill: `finchipaiorg/draft-answer-counterclaims-patent` (Agent Skill) - Install (CLI): `npx skillmds@latest add finchipaiorg/draft-answer-counterclaims-patent` - Raw SKILL.md: https://api.skillmd.com/api/skills/finchipaiorg/draft-answer-counterclaims-patent/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: FinchipAIOrg (https://skillmd.com/u/finchipaiorg) - Updated: 2026-09-22 - Page: https://skillmd.com/skills/finchipaiorg/draft-answer-counterclaims-patent --- # Skill: Draft Answer and Counterclaims to Patent Infringement Complaint ## 1. Subject-matter triage (only if applicable) - Confirm the pleaded case is a patent infringement action and identify the asserted patents, accused products, challenged claims, venue, and any jurisdictional or ownership allegations that affect the responsive pleading. - Separate allegations that can be admitted from technical allegations that should be denied or denied on information and belief after reasonable inquiry. - Identify whether the record supports affirmative counterclaims, including declaratory judgment claims, or whether the pleading should stay within defenses only. - If multiple patents, products, or claim sets are implicated, treat each as a distinct pleading target and do not assume a single response fits all. ## 2. Failure modes the skill is correcting - Admitting complaint allegations that should be denied, especially technical assertions about product operation, claim scope, infringement, inducement, or notice. - Using blanket denials without paragraph-by-paragraph precision or failing to state lack of sufficient information where appropriate. - Pleading affirmative defenses as labels without a factual bridge to the pleadings record, technical materials, licensing history, or prosecution history. - Treating invalidity as a generic defense without tying it to claim-specific prior art theories or a declaratory counterclaim. - Omitting non-infringement or invalidity counterclaims where the record supports independent adjudication and jurisdiction. - Failing to preserve defenses rooted in license, exhaustion, estoppel, unenforceability, or claim construction positions when the facts support them. - Drafting the pleading in a way that is not internally consistent with the complaint, the accused technology, or the prior art analysis. ## 3. Legal frameworks / domain conventions that apply - Federal Rule of Civil Procedure 8(b) governs responses to allegations; each allegation should be admitted, denied, or denied for lack of knowledge after reasonable inquiry. - Federal Rule of Civil Procedure 8(c) governs affirmative defenses; defenses should be stated clearly enough to give fair notice. - Federal Rule of Civil Procedure 11 requires a factual and legal basis for denials, defenses, and counterclaims after reasonable inquiry. - Declaratory judgment counterclaims are commonly pleaded under 28 U.S.C. §§ 2201–2202 when there is an actual controversy over infringement or validity. - Patent invalidity theories generally arise under 35 U.S.C. §§ 102, 103, 112, and related doctrines such as lack of written description, indefiniteness, and lack of enablement. - Patent unenforceability may arise from inequitable conduct, which is governed by the pleading and intent requirements recognized in Federal Circuit precedent. - Infringement defenses often include non-infringement, claim construction limits, exhaustion, license, waiver, laches, estoppel, and failure to mark or provide proper notice where relevant. - Counterclaims should track the live controversy and seek declaratory relief that is independent, justiciable, and supported by the pleadings record. - Prior art analysis should be claim-by-claim and element-by-element, with anticipation and obviousness treated as distinct theories under 35 U.S.C. §§ 102 and 103. - Licensing history, settlement communications, or course of dealing may support license, exhaustion, waiver, or estoppel, but only if the factual record supports pleading them. - Follow the governing pleading standard in the forum for patent invalidity and inequitable conduct allegations, including any heightened particularity requirement when fraud-based theories are asserted. ## 4. Analytical scaffolds - Complaint-by-complaint response: - Read every numbered paragraph. - Classify each allegation as admit, deny, or deny for lack of knowledge after reasonable inquiry. - Keep admissions narrow and avoid volunteering facts that expand liability. - If the complaint alleges technical operation, knowledge, intent, market impact, or claim interpretation, verify before admitting. - Defense inventory: - Build defenses from four source streams: technical non-infringement, invalidity, unenforceability, and transactional history. - Convert each supported theory into a concise, legally recognized affirmative defense rather than a narrative summary. - Do not plead defenses that lack a factual anchor in the record. - Prior art mapping: - For each relevant reference or combination, map claim elements to the record and separate anticipation from obviousness. - Identify whether a reference supports all elements as arranged or whether a combination is needed. - Tie each theory to the asserted claims and to the declaratory invalidity counterclaim. - Counterclaim drafting: - Plead declaratory judgment of non-infringement where the controversy is live and the defendant needs an adjudication that the accused product does not infringe. - Plead declaratory judgment of invalidity where prior art or statutory defects support it, using the specific invalidity theories supported by the record. - Add any additional counterclaim only if the facts and governing law independently support it. - Jurisdiction and justiciability check: - State the basis for subject matter jurisdiction and the case-or-controversy supporting counterclaims. - Ensure the counterclaims are not redundant, inconsistent, or jurisdictionally fragile. - Drafting discipline: - Use short, direct allegations. - Avoid conclusory embellishment. - Maintain consistency between the answer, defenses, and counterclaims. ## 5. Vertical / structural / temporal relationships (only if applicable) - If the complaint pleads multiple patents, each patent may require separate non-infringement and invalidity treatment. - If the accused products or versions changed over time, distinguish pre- and post-change conduct and do not collapse them into one factual position. - If the record contains a licensing or settlement timeline, align defenses such as license, exhaustion, waiver, estoppel, or laches to the relevant dates and transactions. - If prior art or prosecution history arose at different times, preserve the chronology so the pleading does not conflate anticipation, obviousness, and inequitable conduct. - If different corporate entities, business units, or product lines are involved, verify which entity is the proper party for each allegation and counterclaim. ## 6. Output structure conventions - Draft in conventional responsive pleading form: - caption and case information - introduction or general response, if used in the forum - paragraph-by-paragraph responses to the complaint - affirmative defenses, separately labeled and numbered - counterclaims, with factual allegations and counts stated separately - demand for jury trial if supported and strategically appropriate - prayer for relief - signature block and service language as required by the filing context - Keep responses to complaint paragraphs aligned with the complaint’s numbering and terminology. - State affirmative defenses as recognized defenses, not as argument sections. - In counterclaims, plead the jurisdictional basis, the existence of an actual controversy, the defendant’s non-infringement and/or invalidity theories, and the requested declarations. - Use patent-pleading language that is precise but not overinclusive; do not overstate invalidity beyond the theories actually supported. - When facts support it, incorporate a tailored preservation clause for all defenses not waived by the pleading. - Ensure the final document is a complete operative pleading, not a summary, checklist, or memo.