Name Size Creator Creation Date Labels Comment  
PDF File 911188.pdf 508 kB Shaun Ewing Feb 02, 1909 00:00
  • No labels
US-911188-A // Telephone trunking system. // Charles S. Winston // Kellogg Switchboard & Supply
PDF File 999927.pdf 506 kB Shaun Ewing Aug 08, 1911 00:00
  • No labels
US-999927-A // Telephone system. // Harry G. Webster // Kellogg Switchboard & Supply
PDF File 1652203.pdf 505 kB Shaun Ewing Dec 13, 1927 00:00
  • No labels
US-1652203-A // Transformer // Ide Harry H. // Kellogg Switchboard & Supply
PDF File 1844502.pdf 505 kB Shaun Ewing Feb 09, 1932 00:00
  • No labels
US-1844502-A // Power supply circuit // Eaton George R. // Kellogg Switchboard & Supply
PDF File 869067.pdf 505 kB Shaun Ewing Oct 22, 1907 00:00
  • No labels
US-869067-A // Telephone system. // William W. Dean // Kellogg Switchboard & Supply
PDF File 1442130.pdf 503 kB Shaun Ewing Jan 16, 1923 00:00
  • No labels
US-1442130-A // Telephone system // Currier Hiram D. // Kellogg Switchboard & Supply
PDF File 876434.pdf 502 kB Shaun Ewing Jan 14, 1908 00:00
  • No labels
US-876434-A // Non-interfering party-line telephone system. // William R. Brown // Kellogg Switchboard & Supply
PDF File 901738.pdf 500 kB Shaun Ewing Oct 20, 1908 00:00
  • No labels
US-901738-A // Subscriber's telephone-circuit. // Howard M. Post // Kellogg Switchboard & Supply
PDF File 1726179.pdf 500 kB Shaun Ewing Aug 27, 1929 00:00
  • No labels
US-1726179-A // Socket // Grout Martin B. // Kellogg Switchboard & Supply
PDF File 1860996.pdf 499 kB Shaun Ewing May 31, 1932 00:00
  • No labels
US-1860996-A // Receiving circuit // Currier Hiram D. // Kellogg Switchboard & Supply
PDF File 910873.pdf 499 kB Shaun Ewing Jan 26, 1909 00:00
  • No labels
US-910873-A // Telephone ringing system for party-lines. // Charles A. Simpson // Kellogg Switchboard & Supply
PDF File 1251967.pdf 498 kB Shaun Ewing Jan 01, 1918 00:00
  • No labels
US-1251967-A // Call-answering meter for cord-circuits. // Hiram D. Currier // Kellogg Switchboard & Supply
PDF File 911377.pdf 498 kB Shaun Ewing Feb 02, 1909 00:00
  • No labels
US-911377-A // Party-line indicating-key. // Guy M. Campbell // Kellogg Switchboard & Supply
PDF File 1267418.pdf 495 kB Shaun Ewing May 28, 1918 00:00
  • No labels
US-1267418-A // Signaling-horn. // William Kaisling // Kellogg Switchboard & Supply
PDF File 1246362.pdf 494 kB Shaun Ewing Nov 13, 1917 00:00
  • No labels
US-1246362-A // Call-answering meter for cord-circuits. // Richard I. Utter // Kellogg Switchboard & Supply
PDF File 2195328.pdf 493 kB Shaun Ewing Mar 26, 1940 00:00
  • No labels
US-2195328-A // Magneto-electric generator // Eaton George R. // Kellogg Switchboard & Supply
PDF File 845533.pdf 490 kB Shaun Ewing Feb 26, 1907 00:00
  • No labels
US-845533-A // Telephone system. // William W. Dean // Kellogg Switchboard & Supply
PDF File 1117832.pdf 488 kB Shaun Ewing Nov 17, 1914 00:00
  • No labels
US-1117832-A // Signaling system. // Harry C. Goldrick // Kellogg Switchboard & Supply
PDF File 1324452.pdf 486 kB Shaun Ewing Dec 09, 1919 00:00
  • No labels
US-1324452-A // Circuit-breaker relay. // William Kaisling // Kellogg Switchboard & Supply
PDF File 1275766.pdf 485 kB Shaun Ewing Aug 13, 1918 00:00
  • No labels
US-1275766-A // Combined electromagnetically and manually operable organ stop-key. // Fred Schoenwolf // Kellogg Switchboard & Supply
  1. Prev
  2. 1
  3. …
  4. 37
  5. 38
  6. 39
  7. 40
  8. 41
  9. 42
  10. 43
  11. 44
  12. 45
  13. 46
  14. 47
  15. 48
  16. 49
  17. …
  18. 53
  19. Next