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PatentQuill converts the text of a patent specification into USPTO-style black-and-white method flowcharts and system block diagrams. Every box is tied to the sentence it came from, reference numerals are cross-checked against the description, and a free browser checker tests finished drawing sheets against the 37 CFR 1.84 rules. Free tier with watermarked export; paid credit packs and subscriptions are available. It is a drafting aid and not legal advice.
