File:Patent for a Hospital signaling system US1867134.pdf
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current | 01:30, 25 February 2024 | 1,158 × 1,702, 6 pages (675 KB) | Bayoustarwatch | Uploaded a work by BORNETT L. BOBROFF from Patented July 12, 1932 1,867,134 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF MILWAUKEE, WISCONSIN HOSPITAL SIGNALING SYSTEM Application filed April 4, 1928. Serial No. 267,455. https://patentimages.storage.googleapis.com/2b/21/37/aa420d416b771f/US1867134.pdf with UploadWizard |
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