File:Patent for a Switch for signaling systems US1825991.pdf
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current | 23:02, 2 March 2024 | ![]() | 1,158 × 1,702, 4 pages (432 KB) | Bayoustarwatch | Uploaded a work by Bornett L. Bobroff (15 Sep 1882 - 27 Dec 1945) from Patented Oct. 6, 1931 1,825,991 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF RACINE, WISCONSIN SWITCH FOR SIGNALING SYSTEMS Application filed July 18, 1929. Serial No. 379,144. https://patentimages.storage.googleapis.com/6a/0b/7b/3d92c210449829/US1825991.pdf with UploadWizard |
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