Name Size Creator Creation Date Labels Comment  
PDF File 1833984.pdf 425 kB Shaun Ewing Dec 01, 1931 00:00
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US-1833984-A // Socket // Bohlman Ernest A. // Kellogg Switchboard & Supply
PDF File 1833893.pdf 1.26 MB Shaun Ewing Dec 01, 1931 00:00
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US-1833893-A // Tuning control // Eaton George R. ; Rose Morris // Kellogg Switchboard & Supply
PDF File 1829077.pdf 481 kB Shaun Ewing Oct 27, 1931 00:00
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US-1829077-A // Plug seat // Willet George R. // Kellogg Switchboard & Supply
PDF File 1829071.pdf 2.28 MB Shaun Ewing Oct 27, 1931 00:00
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US-1829071-A // Telephone system // Stazak Michael B. // Kellogg Switchboard & Supply
PDF File 1829070.pdf 1.83 MB Shaun Ewing Oct 27, 1931 00:00
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US-1829070-A // Telephone system // Stazak Michael B. // Kellogg Switchboard & Supply
PDF File 1813241.pdf 348 kB Shaun Ewing Jul 07, 1931 00:00
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US-1813241-A // Thermionic tube // Koch Earl L. // Kellogg Switchboard & Supply
PDF File 1813232.pdf 700 kB Shaun Ewing Jul 07, 1931 00:00
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US-1813232-A // Receiving circuit // Currier Hiram D. // Kellogg Switchboard & Supply
PDF File 1805846.pdf 572 kB Shaun Ewing May 19, 1931 00:00
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US-1805846-A // Loop antenna // Potter Earl F. // Kellogg Switchboard & Supply
PDF File 1805794.pdf 319 kB Shaun Ewing May 19, 1931 00:00
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US-1805794-A // Audion tube // Yanochowski George A. // Kellogg Switchboard & Supply
PDF File 1805783.pdf 602 kB Shaun Ewing May 19, 1931 00:00
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US-1805783-A // Socket // Olsen Halvor M. // Kellogg Switchboard & Supply
PDF File 1797988.pdf 411 kB Shaun Ewing Mar 24, 1931 00:00
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US-1797988-A // Radio receiving system // Koch Earl L. // Kellogg Switchboard & Supply
PDF File 1797935.pdf 1.66 MB Shaun Ewing Mar 24, 1931 00:00
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US-1797935-A // Telephone system // Wallace Bert // Kellogg Switchboard & Supply
PDF File 1794753.pdf 1.22 MB Shaun Ewing Mar 03, 1931 00:00
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US-1794753-A // Tube mechanism // Bohlman Ernest A. ; Rose Morris // Kellogg Switchboard & Supply
PDF File 1794752.pdf 1.04 MB Shaun Ewing Mar 03, 1931 00:00
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US-1794752-A // Multiple control // Bohlman Ernest A. // Kellogg Switchboard & Supply
PDF File 1791132.pdf 294 kB Shaun Ewing Feb 03, 1931 00:00
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US-1791132-A // Register device // Jacoby William L. // Kellogg Switchboard & Supply
PDF File 1791131.pdf 597 kB Shaun Ewing Feb 03, 1931 00:00
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US-1791131-A // Illuminated dial // Horn Royal // Kellogg Switchboard & Supply
PDF File 1783645.pdf 688 kB Shaun Ewing Dec 02, 1930 00:00
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US-1783645-A // Control device // Grout Martin B. // Kellogg Switchboard & Supply
PDF File 1782411.pdf 676 kB Shaun Ewing Nov 25, 1930 00:00
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US-1782411-A // Socket // Currier Hiram D. // Kellogg Switchboard & Supply
PDF File 1781384.pdf 952 kB Shaun Ewing Nov 11, 1930 00:00
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US-1781384-A // Socket // Grout Martin B. // Kellogg Switchboard & Supply
PDF File 1778896.pdf 535 kB Shaun Ewing Oct 21, 1930 00:00
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US-1778896-A // Terminal cap // Grout Martin B. // Kellogg Switchboard & Supply
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