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Original file (1,158 × 1,702 pixels, file size: 399 KB, MIME type: application/pdf, 4 pages)

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English: Patented Oct. 27, 1931 1,829,037

UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF RACINE, WISCONSIN SWITCH FOR SIGNALING SYSTEMS

Application Aled July 12, 1929. Serial No. 377,822.
Date
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Patented Oct. 27, 1931 1,829,037 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF RACINE, WISCONSIN SWITCH FOR SIGNALING SYSTEMS Application Aled July 12, 1929. Serial No. 377,822.

https://patentimages.storage.googleapis.com/92/dd/8c/ebe50aea1900bc/US1829037.pdf
Author Bornett L. Bobroff (15 Sep 1882 - 27 Dec 1945)

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Patented Oct. 27, 1931 1,829,037 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF RACINE, WISCONSIN SWITCH FOR SIGNALING SYSTEMS Application Aled July 12, 1929. Serial No. 377,822.

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