Joint Claim Construction Chart

Joint Claim Construction Chart

Drafts a joint claim construction chart presenting parties' competing interpretations of disputed patent claim terms for Markman proceedings.

Prerequisites

• Asserted patent(s): number, title, issue date, inventors, full claim text
• Case caption: party names, court/​division, civil action number
• Identified disputed terms from contentions or meet-and-confer
• Parties' proposed constructions with supporting intrinsic evidence
• Prosecution history: office action responses, amendments, examiner statements
• Applicable local patent rules (e.g., N.D. Cal., E.D. Tex., D. Del.)

Quick Start

1. Gather patent documents, disputed terms, and both parties' proposed constructions
2. Identify the district's local patent rules for formatting requirements
3. Build the disputed terms table with per-term evidence citations
4. Classify each term as agreed, partially agreed, or disputed
5. Add certifications and signature blocks per local rules

Output Structure

Caption and Cover

Include: court (full designation with division), all parties, civil action number, patent(s) with number/​title/​issue date/​inventors, and document title per local rules ("Joint Claim Construction Chart" or "Joint Claim Construction and Prehearing Statement").

Disputed Terms Table

One row per disputed term with these columns:

Evidence Citations

For each proposed construction, cite intrinsic evidence:

• Specification — col:line (utility) or paragraph number (applications)
• Claims — related claim language providing definitional context
• Prosecution history — office action responses, amendments, applicant arguments
• Figures/​embodiments — specific figures illustrating term meaning

All constructions follow Phillips v. AWH Corp., 415 F.3d 1303 (Fed. Cir. 2005) (en banc): terms receive ordinary and customary meaning to a POSITA at time of invention, read in light of specification and prosecution history.

If extrinsic evidence is used, it is subordinate to intrinsic evidence per Phillips. Acceptable types: contemporaneous technical dictionaries/​treatises, expert declarations (with qualifications and POSITA basis), prior art showing terminology usage, admissible inventor testimony.

Agreement and Disagreement

For each term, classify as:

• Full agreement — present agreed construction; note no judicial construction needed
• Partial agreement — state agreed portions, isolate remaining disputes
• Full disagreement — summarize dispute nature (scope, embodiment limitation, prosecution history impact, indefiniteness)

Indefiniteness Contentions

If a term is challenged under 35 U.S.C. § 112(b):

• State position in defendant's construction column
• Apply Nautilus, Inc. v. Biosig Instruments, Inc., 572 U.S. 901 (2014): whether claim "inform[s] those skilled in the art about the scope of the invention with reasonable certainty"
• Provide factual and legal basis

Certifications and Signatures

• Signature blocks for lead counsel (each party): name, bar number, firm, address, phone, email
• Meet-and-confer certification: dates, participants, good-faith compliance with local patent rules
• Any additional certifications required by local rules

Checks and Pitfalls

• Pin-cite everything — specification col:line, prosecution history date/​page, case reporter/​page
• Mirror structure — defendant's section must parallel plaintiff's format exactly
• Bluebook citations — proper case names, reporters, pinpoints, parentheticals
• USPTO conventions — patent number, inventor names, issue date, col:line references
• District-specific compliance — check local rules for meet-and-confer requirements, page limits, font/​margin rules, joint vs. separate filing
• Jury-suitable constructions — plain-language meanings understandable to a lay jury
• Omit agreed terms unless local rules require listing them
• Flag same-term-different-context — a term in multiple claims may warrant different constructions
• Group related terms by technology concept or claim element when logical