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1898–1997 · EVERY GAP WITH ITS SETTLING SOURCE
The 1926 volume: The Index of Patents Issued for 1926 was not found in any collection — the Archive's 1926 commissioner volume is the administrative report, not the patentee index — so the works' 1926 paper rests on the years bracketing it: Blair's designs of 1925 and 1927 and Ferrettie's of 1927 stand on either side, and any 1926 grant between them is uncounted here. The settling source is the 1926 Index volume itself, or the Official Gazette weekly lists for 1926.
Numbers unpinned:The settling source in each case is the patent's own face, reachable through the Official Gazette weekly grant lists for the year or a Google Patents inventor search on a connected terminal. Two further numbers come down in conflict and are printed nowhere in this section as settled: the Index gives Bush and Lovell's rubber-coating grant of 9 February 1943 a number that the structured records assign to an unrelated knitting-machine patent, and the subject index gives Svendsen and Clayton's sponge-manufacture grant of August 1944 a number the same records assign to a toaster; in both cases the grant, its men, its assignee, and its date stand on the annual Index, and the settling source is the patent face. Bradley and Van Dinter's second fastener-covering grant of 1928, Bradley and Ferrettie's joint entry of 1931, Cunningham's Bendix-only grant of 1937, Luxenberger and Erich's joint grant of 1944, Price's two garbled regenerating grants of 1916, Daly's blends grant of February 1951, and Yaggi's 1951 entry stand in the same posture — the entries exist, the lists print them, and their numbers wait on cleaner copies of the same volumes.
Faces unread: John F. Amos's hollow-article molding patent of 1934 (No. The Cunningham seating grants of 1945 (No. 2,372,561 in particular) rest on the Index's figures where its text is worn; the faces would confirm them.
The post-1973 boundary, stated plainly: The annual Index ceases to be a residence record in the 1970s, and after 1973 the search's method loses its census. What was done instead is printed so it can be weighed: the assignee names were chased into the 1985 and 1987 index volumes on the Archive's microfilm, where no Mishawaka-named assignee appears and no Uniroyal entry carries a Mishawaka tie on its face. The honest estimate follows from the record's shape: by the last full decade the lists do cover, the works' paper had fallen to a handful of design grants under a shortened corporate name, and the plant itself closed in 1997; a small residue of Uniroyal-era grants by Mishawaka residents, invisible to any name-based sweep because the later indexes print no residences, is possible and is estimated here at no more than a few percent of the roster — small in count, and by the record's trajectory almost certainly design and product paper rather than a second inventive age. The settling source for the whole 1974–1997 stretch is a face-by-face read of Uniroyal's grants against the plant's personnel record, a pull sized for the Ancestry-and-records run the project's standing orders already contemplate.
Sources:
- The sweep's own working record: the volumes read whole (1898–1919 annual lists; 1920–1973 indexes, with 1926 missing as stated), the 1985 and 1987 index reels, and the conflict log from which the unpinned and conflicting numbers above are taken, each printed at the strength its surviving record earns.