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File:Patent for a Quick-break switch US1289623.pdf

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Original file (1,158 × 1,702 pixels, file size: 331 KB, MIME type: application/pdf, 3 pages)

Summary

Description
English: UNITED STATES PATENT OFFICE.

BORNETT L. BOBROFF, OF MILWAUKEE, WISCONSIN. QUICK-BREAK SWITCH. 1,289,623. Specification of Letters Patent. Patented Dec. 31, 1918.

Application filed June 18, 1917. Serial No. 175,322.
Date
Source

UNITED STATES PATENT OFFICE. BORNETT L. BOBROFF, OF MILWAUKEE, WISCONSIN. QUICK-BREAK SWITCH. 1,289,623. Specification of Letters Patent. Patented Dec. 31, 1918. Application filed June 18, 1917. Serial No. 175,322.

https://patentimages.storage.googleapis.com/7a/24/3a/65901ce1362123/US1289623.pdf
Author Bornett L. Bobroff (15 Sep 1882 - 27 Dec 1945)

Licensing

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Patent_for_a_Quick-break_switch_US1289623.pdf

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UNITED STATES PATENT OFFICE. BORNETT L. BOBROFF, OF MILWAUKEE, WISCONSIN. QUICK-BREAK SWITCH. 1,289,623. Specification of Letters Patent. Patented Dec. 31, 1918. Application filed June 18, 1917. Serial No. 175,322.

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31 December 1918Gregorian

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