Abstract: A process for creating a claim chart. Information is maintained in a database about a patent portfolio including at least one patent including at least one claim having at least one claim element and about a product portfolio including at least one product having at least one product characteristic. A collection of proof pieces are maintained in the database each representing an assertion about a product characteristic. A current product in the product portfolio, a current patent in the patent portfolio, and a current claim in the current patent are selected. For each claim element of the current claim, an element proof is constructed by selecting a proof piece showing that a product characteristic of the current product matches the claim element. Then a document is generated showing the claim chart as a collection of the element proofs.