Name Size Creator Creation Date Labels Comment  
PDF File 814118.pdf 390 kB Shaun Ewing Mar 06, 1906 00:00
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US-814118-A // Telephone system. // William W. Dean // Kellogg Switchboard & Supply
PDF File 1401217.pdf 390 kB Shaun Ewing Dec 27, 1921 00:00
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US-1401217-A // Switchboard-plug // Weiss Alfred H. // Kellogg Switchboard & Supply
PDF File 1023185.pdf 390 kB Shaun Ewing Apr 16, 1912 00:00
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US-1023185-A // Telephone-exchange system. // Harry G. Webster // Kellogg Switchboard & Supply
PDF File 1056866.pdf 386 kB Shaun Ewing Mar 25, 1913 00:00
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US-1056866-A // Circuit-changing mechanism. // Harry G. Webster // Kellogg Switchboard & Supply
PDF File 977658.pdf 386 kB Shaun Ewing Dec 06, 1910 00:00
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US-977658-A // Telephone desk-stand. // William Leaver // Kellogg Switchboard & Supply
PDF File 1778836.pdf 386 kB Shaun Ewing Oct 21, 1930 00:00
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US-1778836-A // Distributor // Sauer Louis B. // Kellogg Switchboard & Supply
PDF File 1099164.pdf 385 kB Shaun Ewing Jun 09, 1914 00:00
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US-1099164-A // Party-line ringing-key. // Alva J. Carter // Kellogg Switchboard & Supply
PDF File 1190608.pdf 383 kB Shaun Ewing Jul 11, 1916 00:00
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US-1190608-A // Buzzer. // Richard I. Utter // Kellogg Switchboard & Supply
PDF File 969818.pdf 383 kB Shaun Ewing Sept 13, 1910 00:00
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US-969818-A // Telephone-drop. // Alfred H. Weiss // Kellogg Switchboard & Supply
PDF File 1927514.pdf 383 kB Shaun Ewing Sept 19, 1933 00:00
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US-1927514-A // Telephone switchboard // Eaton George R. // Kellogg Switchboard & Supply
PDF File 1577031.pdf 383 kB Shaun Ewing Mar 16, 1926 00:00
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US-1577031-A // Relay // Kaisling William // Kellogg Switchboard & Supply
PDF File 1131389.pdf 377 kB Shaun Ewing Mar 09, 1915 00:00
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US-1131389-A // Combined drop and jack. // William Leaver // Kellogg Switchboard & Supply
PDF File 2007764.pdf 376 kB Shaun Ewing Jul 09, 1935 00:00
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US-2007764-A // Circuit for audion tubes // Koch Earl L. // Kellogg Switchboard & Supply
PDF File 1005910.pdf 376 kB Shaun Ewing Oct 17, 1911 00:00
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US-1005910-A // Key-switch. // Alfred H. Weiss // Kellogg Switchboard & Supply
PDF File 1727123.pdf 374 kB Shaun Ewing Sept 03, 1929 00:00
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US-1727123-A // Radio receiving system // Kellogg Leroy D. // Kellogg Switchboard & Supply
PDF File 2441041.pdf 373 kB Shaun Ewing May 04, 1948 00:00
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US-2441041-A // Two-step relay // Staszak Michael B. // Kellogg Switchboard & Supply
PDF File 832181.pdf 370 kB Shaun Ewing Oct 02, 1906 00:00
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US-832181-A // Electromagnetic device. // William W. Dean // Kellogg Switchboard & Supply
PDF File 1016567.pdf 369 kB Shaun Ewing Feb 06, 1912 00:00
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US-1016567-A // Spring-armature relay. // William Kaisling // Kellogg Switchboard & Supply
PDF File 1670892.pdf 365 kB Shaun Ewing May 22, 1928 00:00
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US-1670892-A // Method of treating tubes // Koch Earl L. // Kellogg Switchboard & Supply
PDF File 902356.pdf 363 kB Shaun Ewing Oct 27, 1908 00:00
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US-902356-A // Four-party-line indicating ringing key. // Charles S. Winston // Kellogg Switchboard & Supply
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