File:Patent for a Hospital signaling system US1751972.pdf
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current | 20:58, 2 March 2024 | ![]() | 1,158 × 1,702, 7 pages (819 KB) | Bayoustarwatch | Uploaded a work by Bornett L. Bobroff (15 Sep 1882 - 27 Dec 1945) from Patented Mar. 25, 1930 1,751,972 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF MILWAUKEE, WISCONSIN HOSPITAL SIGNALING SYSTEM Appliention filed November 17, 1924. Serial No. 750,302. https://patentimages.storage.googleapis.com/ca/31/d7/b026870669d5da/US1751972.pdf with UploadWizard |
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