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The Commissioner of Patents' annual lists, 1898–1919; the Index of Patents Issued, 1920–1973; the faces read from the documents
What it is: the Inventors legs' instruments.Scientific American's official patent list (week ending 10 August 1869) and the construing opinion in Dodge v. Ohio Valley Pulley Works, 101 F. 581 (6th Cir. 1899).Annual Report of the Commissioner of Patents patentee lists, 1898–1919, in the archive.org djvu texts, searched on the string "ishawaka" to catch the OCR's loss of the first letter; and the Index of Patents IssuedVerification ran through the faces (US 1,271,843 read in full), the Patent Office's image PDFs by number — scanned images with no text layer: rendered, downscaled, read visually — and some sixty structured records through PubChem's PUG-View, which is how the two conflicts between the Index and the structured records were caught; the grants stand on the Index, and the conflicted numbers are printed nowhere as settled.
Its standing, from this build's experience: the sweep's blank years are findings, printed as such (1939, 1958–61, 1964–73), and its boundary is stated plainly: after 1973 the Index stops printing residences, two later reels show no Mishawaka assignee, and the missed share for 1974–97 is estimated at a few percent at most — settleable only by a face-by-face read against plant personnel records, sized in the note for the future records run, not for a name sweep.
Where it fails: the 1926 Index volume was not found on archive.org under any identifier the pass tried — 1926 stands bracketed and uncounted, its settling source the volume itself or the 1926 Official Gazette weekly lists; five pre-1920 numbers stand unpinned, and one patent's face (US 1,946,471) unread, carried open. The pass's door map is part of the record (Part five): the patent databases that refused this seat are named there, once, so no later pass re-probes them blind.
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