Name Size Creator Creation Date Labels Comment  
PDF File 1930255.pdf 3.81 MB Shaun Ewing Oct 10, 1933 00:00
  • No labels
US-1930255-A // Telephone system // Smith Gerard V. // Bell Telephone Labor Inc
PDF File 1929925.pdf 386 kB Shaun Ewing Oct 10, 1933 00:00
  • No labels
US-1929925-A // Multiple terminal bank // Kuhn John J. // Bell Telephone Labor Inc
PDF File 1929446.pdf 257 kB Shaun Ewing Oct 10, 1933 00:00
  • No labels
US-1929446-A // Resistance device // Ogg Robert A. // Bell Telephone Labor Inc
PDF File 1927400.pdf 467 kB Shaun Ewing Sept 19, 1933 00:00
  • No labels
US-1927400-A // Method of applying and vulcanizing an insulating compound // Gray Alvin N. ; Kemp Archie R. // Bell Telephone Labor Inc
PDF File 1927099.pdf 332 kB Shaun Ewing Sept 19, 1933 00:00
  • No labels
US-1927099-A // Vacuum tube circuits // Shower Edmund G. // Bell Telephone Labor Inc
PDF File 1927084.pdf 665 kB Shaun Ewing Sept 19, 1933 00:00
  • No labels
US-1927084-A // Support for filament assemblies // Depew Charles // Bell Telephone Labor Inc
PDF File 1927082.pdf 272 kB Shaun Ewing Sept 19, 1933 00:00
  • No labels
US-1927082-A // Amplifier // Corbin Joseph E. // Bell Telephone Labor Inc
PDF File 1927070.pdf 537 kB Shaun Ewing Sept 19, 1933 00:00
  • No labels
US-1927070-A // Distortion correction in wave transmission systems // Peterson Eugene // Bell Telephone Labor Inc
PDF File 1926899.pdf 382 kB Shaun Ewing Sept 12, 1933 00:00
  • No labels
US-1926899-A // Submarine communication cable // Gilbert John J. // Bell Telephone Labor Inc
PDF File 1926894.pdf 2.91 MB Shaun Ewing Sept 12, 1933 00:00
  • No labels
US-1926894-A // Selector testing system // Dehn Joseph W. // Bell Telephone Labor Inc
PDF File 1926889.pdf 410 kB Shaun Ewing Sept 12, 1933 00:00
  • No labels
US-1926889-A // Glow discharge device // Weinhart Howard W. // Bell Telephone Labor Inc
PDF File 1926880.pdf 1.82 MB Shaun Ewing Sept 12, 1933 00:00
  • No labels
US-1926880-A // Transmission control in two-way signaling systems // Norwine Andrew C. // Bell Telephone Labor Inc
PDF File 1926877.pdf 199 kB Shaun Ewing Sept 12, 1933 00:00
  • No labels
US-1926877-A // Transmission network // Marrison Warren A. // Bell Telephone Labor Inc
PDF File 1926876.pdf 652 kB Shaun Ewing Sept 12, 1933 00:00
  • No labels
US-1926876-A // Time announcing machine // Mallina Rudolph F. // Bell Telephone Labor Inc
PDF File 1925696.pdf 988 kB Shaun Ewing Sept 05, 1933 00:00
  • No labels
US-1925696-A // Telephone system // Irvine Frank S. // Bell Telephone Labor Inc
PDF File 1925693.pdf 455 kB Shaun Ewing Sept 05, 1933 00:00
  • No labels
US-1925693-A // Glow discharge lamp // Gray Frank // Bell Telephone Labor Inc
PDF File 1925690.pdf 425 kB Shaun Ewing Sept 05, 1933 00:00
  • No labels
US-1925690-A // Sound picture system // Elmer Lloyd A. // Bell Telephone Labor Inc
PDF File 1925659.pdf 499 kB Shaun Ewing Sept 05, 1933 00:00
  • No labels
US-1925659-A // Acoustic device // Giles Leonard W. // Bell Telephone Labor Inc
PDF File 1924836.pdf 311 kB Shaun Ewing Aug 29, 1933 00:00
  • No labels
US-1924836-A // Amplifier // Cousins Van M. // Bell Telephone Labor Inc
PDF File 1924115.pdf 703 kB Shaun Ewing Aug 29, 1933 00:00
  • No labels
US-1924115-A // Protective means for electrical systems // Ferrell Enoch B. // Bell Telephone Labor Inc
  1. Prev
  2. 1
  3. 102
  4. 103
  5. 104
  6. 105
  7. 106
  8. 107
  9. 108
  10. 109
  11. 110
  12. 111
  13. 112
  14. 113
  15. 114
  16. 150
  17. Next