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BTC-5 NAMED GAP · THE CLAIM TESTED NEGATIVE, THE PATENT SWEEP STANDING
The checklist asks whether the town claims an inventor — the local Edison every ambitious town history of the era produced — and the claim test runs negative through every narrative record this wave read. No inventor, invention, or patent story attaches to any Walkerton name in Chapman (1880), in Howard (1907), in Sherland's compilation of the Independent, or in the society's exhibits: the town's mechanical fame ran the other way, to imported skill (the glass cutters) and imported capital (the Chicago firm, the composites chemists of a later era — Sam Shobert's pultrusion priority is a genuine innovation claim, and it stands in the wealth addendum at company-record strength, but it is a firm's claim, not a town legend, and no folk inventor grew around it). The patent-office sweep itself — Walkerton assignees and inventor-residences, 1850–1950, in Google Patents and the Commissioner of Patents' annual indexes — was not executed at register strength in this section, and it stands as the item's named gap with those settlers named. The finding prints in two parts, as the evidence splits: at the level of the town's told history, exhausted and negative — Walkerton claims no inventor; at the level of the federal register, unsearched and standing.
Principal sources: the negative narrative run of this wave (Chapman; Howard; Sherland via the WAHS exhibits); the named federal settlers (Google Patents; the annual reports of the Commissioner of Patents).