Name Size Creator Creation Date Labels Comment  
PDF File 1657567.pdf 467 kB Shaun Ewing Jan 31, 1928 00:00
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US-1657567-A // Method of receiving electrical oscillations // Currier Hiram D. // Kellogg Switchboard & Supply
PDF File 1396072.pdf 465 kB Shaun Ewing Nov 08, 1921 00:00
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US-1396072-A // Relay // Sparks Charles // Kellogg Switchboard & Supply
PDF File 1584506.pdf 465 kB Shaun Ewing May 11, 1926 00:00
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US-1584506-A // Ringer // Bohlman Ernest A. // Kellogg Switchboard & Supply
PDF File 1659789.pdf 461 kB Shaun Ewing Feb 21, 1928 00:00
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US-1659789-A // Combined drop and jack // Sparks Charles // Kellogg Switchboard & Supply
PDF File 901127.pdf 460 kB Shaun Ewing Oct 13, 1908 00:00
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US-901127-A // Apparatus for telephone installations. // Charles A. Simpson // Kellogg Switchboard & Supply
PDF File 936373.pdf 460 kB Shaun Ewing Oct 12, 1909 00:00
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US-936373-A // Selective ringing-key. // Charles A. Simpson // Kellogg Switchboard & Supply
PDF File 1196323.pdf 460 kB Shaun Ewing Aug 29, 1916 00:00
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US-1196323-A // Telephone signaling system. // Joseph S. Allen // Kellogg Switchboard & Supply
PDF File 592339.pdf 460 kB Shaun Ewing Oct 26, 1897 00:00
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US-592339-A // Milo g- // Milo G-. Kellogg, Of Illinois // The Kellogg Switchboard And Supply Company, Of Same Place.
PDF File 843329.pdf 460 kB Shaun Ewing Feb 05, 1907 00:00
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US-843329-A // Intercommunicating telephone system. // William W. Dean // Kellogg Switchboard & Supply
PDF File 592329.pdf 460 kB Shaun Ewing Oct 26, 1897 00:00
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US-592329-A // Milo g // Milo G. Kellogg, Of Illinois // The Kellogg Switchboard And Supply Company, Of Same Place.
PDF File 1439036.pdf 458 kB Shaun Ewing Dec 19, 1922 00:00
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US-1439036-A // Voltage-regulating circuit // Suekoff Samuel // Kellogg Switchboard & Supply
PDF File 1083926.pdf 457 kB Shaun Ewing Jan 13, 1914 00:00
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US-1083926-A // Microphone. // Lawrence Ericson // Kellogg Switchboard & Supply
PDF File 1144135.pdf 456 kB Shaun Ewing Jun 22, 1915 00:00
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US-1144135-A // Ignition-timer. // William Kaisling // Kellogg Switchboard & Supply
PDF File 2452434.pdf 455 kB Shaun Ewing Oct 26, 1948 00:00
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US-2452434-A // Apparatus for making elastic coil structures with longitudinal ends // Crehan William J. ; Arnold Ralph J. // Kellogg Switchboard & Supply ; Ralph D Collins
PDF File 983966.pdf 454 kB Shaun Ewing Feb 14, 1911 00:00
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US-983966-A // Telephone testing system. // Charles S. Winston // Kellogg Switchboard & Supply
PDF File 1147895.pdf 454 kB Shaun Ewing Jul 27, 1915 00:00
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US-1147895-A // Telephone system. // Newton C. Schellenger // Kellogg Switchboard & Supply
PDF File 895166.pdf 453 kB Shaun Ewing Aug 04, 1908 00:00
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US-895166-A // Telephone system. // William W. Dean // Kellogg Switchboard & Supply
PDF File 2340777.pdf 452 kB Shaun Ewing Feb 01, 1944 00:00
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US-2340777-A // Throat microphone // Stanley Harvey H. // Kellogg Switchboard & Supply
PDF File 1141107.pdf 449 kB Shaun Ewing Jun 01, 1915 00:00
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US-1141107-A // Telephone-transmitter. // William W. Dean // Kellogg Switchboard & Supply
PDF File 1450169.pdf 448 kB Shaun Ewing Apr 03, 1923 00:00
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US-1450169-A // Desk-stand base // Bohlman Ernest A. // Kellogg Switchboard & Supply
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