Name Size Creator Creation Date Labels Comment  
PDF File 1833000.pdf 414 kB Shaun Ewing Nov 24, 1931 00:00
  • No labels
US-1833000-A // Selective signaling system // Shafer William L. // American Telephone & Telegraph
PDF File 1831901.pdf 413 kB Shaun Ewing Nov 17, 1931 00:00
  • No labels
US-1831901-A // Telephone system // Bascom Henry M. // American Telephone & Telegraph
PDF File 1790069.pdf 412 kB Shaun Ewing Jan 27, 1931 00:00
  • No labels
US-1790069-A // Designation label // Neeb Lawrence S. // American Telephone & Telegraph
PDF File 1927989.pdf 411 kB Shaun Ewing Sept 26, 1933 00:00
  • No labels
US-1927989-A // System for replacement of alpha defective circuit // Nyquist Harry // American Telephone & Telegraph
PDF File 1869458.pdf 411 kB Shaun Ewing Aug 02, 1932 00:00
  • No labels
US-1869458-A // Communication system // Bickelhaupt Carroll O. ; Penuel Cecil E. // American Telephone & Telegraph
PDF File 2110536.pdf 410 kB Shaun Ewing Mar 08, 1938 00:00
  • No labels
US-2110536-A // Electrical protection apparatus // Swart Leland Kasson // American Telephone & Telegraph
PDF File 1814956.pdf 409 kB Shaun Ewing Jul 14, 1931 00:00
  • No labels
US-1814956-A // Radio signaling system // Ohl Russell S. // American Telephone & Telegraph
PDF File 2030987.pdf 409 kB Shaun Ewing Feb 18, 1936 00:00
  • No labels
US-2030987-A // Oscillation control device // Herckmans Alfred // American Telephone & Telegraph
PDF File 2213363.pdf 409 kB Shaun Ewing Sept 03, 1940 00:00
  • No labels
US-2213363-A // Means for lashing cables to supporting strands // Creswell Charles Edward // American Telephone & Telegraph
PDF File 2106286.pdf 408 kB Shaun Ewing Jan 25, 1938 00:00
  • No labels
US-2106286-A // Gas-filled tube circuits // Swart Leland Kasson // American Telephone & Telegraph
PDF File 1858350.pdf 408 kB Shaun Ewing May 17, 1932 00:00
  • No labels
US-1858350-A // Printing telegraph system // Weaver Allan // American Telephone & Telegraph
PDF File 1963223.pdf 407 kB Shaun Ewing Jun 19, 1934 00:00
  • No labels
US-1963223-A // Radio volume compression system // Bown Ralph // American Telephone & Telegraph
PDF File 1864646.pdf 407 kB Shaun Ewing Jun 28, 1932 00:00
  • No labels
US-1864646-A // Telephone signaling arrangement // Edwards William H. // American Telephone & Telegraph
PDF File 1858338.pdf 407 kB Shaun Ewing May 17, 1932 00:00
  • No labels
US-1858338-A // Means for compensating for nonlinear distortion in transmission circuits // Nyquist Harry // American Telephone & Telegraph
PDF File 2154579.pdf 407 kB Shaun Ewing Apr 18, 1939 00:00
  • No labels
US-2154579-A // Telephone conference circuit // Parrott John Angell // American Telephone & Telegraph
PDF File 1911480.pdf 407 kB Shaun Ewing May 30, 1933 00:00
  • No labels
US-1911480-A // Electrical protective system // Swart Leland K. // American Telephone & Telegraph
PDF File 1865593.pdf 406 kB Shaun Ewing Jul 05, 1932 00:00
  • No labels
US-1865593-A // Means for eliminating interference in grounded telegraph systems // Singer Fred J. // American Telephone & Telegraph
PDF File 1804526.pdf 406 kB Shaun Ewing May 12, 1931 00:00
  • No labels
US-1804526-A // Radio receiving circuit // Coxhead Harry B. // American Telephone & Telegraph
PDF File 1964141.pdf 406 kB Shaun Ewing Jun 26, 1934 00:00
  • No labels
US-1964141-A // Impedance measuring circuits // Rhodes Harold A. ; Cowan Frank A. // American Telephone & Telegraph
PDF File 2053988.pdf 406 kB Shaun Ewing Sept 08, 1936 00:00
  • No labels
US-2053988-A // Electrical protective system // Ferris Livingston Polk ; Montclair Upper ; Honaman Richard Karl ; Inskip Leonard S. // American Telephone & Telegraph
  1. Prev
  2. 1
  3. 28
  4. 29
  5. 30
  6. 31
  7. 32
  8. 33
  9. 34
  10. 35
  11. 36
  12. 37
  13. 38
  14. 39
  15. 40
  16. 49
  17. Next