Name Size Creator Creation Date Labels Comment  
PDF File 2258437.pdf 375 kB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2258437-A // Gas tube // Badgley Robert H. // Bell Telephone Labor Inc
PDF File 2258276.pdf 466 kB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2258276-A // Apparatus for measuring the elastic properties of materials // Boettler Jacob R. ; Werring Walter W. // Bell Telephone Labor Inc
PDF File 2258275.pdf 506 kB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2258275-A // Repeatered transmission system // Black Harold S. // Bell Telephone Labor Inc
PDF File 2258128.pdf 1.37 MB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2258128-A // Wave translating system // Black Harold S. // Bell Telephone Labor Inc
PDF File 2257963.pdf 439 kB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2257963-A // Rod withdrawing tool // Kent Robert J. // Bell Telephone Labor Inc
PDF File 2257894.pdf 1022 kB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2257894-A // Telephone system // Jr. Paul Winsor, // Bell Telephone Labor Inc
PDF File 2257882.pdf 1.17 MB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2257882-A // Telephone system // Lundstrom Alexis A. // Bell Telephone Labor Inc
PDF File 2257806.pdf 958 kB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2257806-A // Echo suppressing circuit // Mitchell Doren // Bell Telephone Labor Inc
PDF File 2257795.pdf 1.26 MB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2257795-A // Electron discharge apparatus and circuits // Gray Frank // Bell Telephone Labor Inc
PDF File 2257783.pdf 930 kB Shaun Ewing Oct 07, 1941 00:00
  • No labels
US-2257783-A // Guided wave transmission // Bowen Arnold E. // Bell Telephone Labor Inc
PDF File 2257568.pdf 2.20 MB Shaun Ewing Sept 30, 1941 00:00
  • No labels
US-2257568-A // Communication system // Mathes Robert C. // Bell Telephone Labor Inc
PDF File 2255596.pdf 2.05 MB Shaun Ewing Sept 09, 1941 00:00
  • No labels
US-2255596-A // Teletypewriter switching system // Bonorden Allen R. // Bell Telephone Labor Inc
PDF File 2255595.pdf 1.55 MB Shaun Ewing Sept 09, 1941 00:00
  • No labels
US-2255595-A // Signaling system // Bonorden Allen R. // Bell Telephone Labor Inc
PDF File 2254852.pdf 424 kB Shaun Ewing Sept 02, 1941 00:00
  • No labels
US-2254852-A // Oscillation generator // Miller Ralph L. // Bell Telephone Labor Inc
PDF File 2254733.pdf 764 kB Shaun Ewing Sept 02, 1941 00:00
  • No labels
US-2254733-A // Control of two-way telephone systems // Dickieson Alton C. // Bell Telephone Labor Inc
PDF File 2254723.pdf 646 kB Shaun Ewing Sept 02, 1941 00:00
  • No labels
US-2254723-A // Subscriber line circuit // Allen Lawrence H. // Bell Telephone Labor Inc
PDF File 2254614.pdf 1.48 MB Shaun Ewing Sept 02, 1941 00:00
  • No labels
US-2254614-A // Electro-optical scanning system // Mattke Charles F. // Bell Telephone Labor Inc
PDF File 2254601.pdf 1.56 MB Shaun Ewing Sept 02, 1941 00:00
  • No labels
US-2254601-A // Automatic measuring of cross talk // Jr. Edwin P. Felch, // Bell Telephone Labor Inc
PDF File 2254589.pdf 1.26 MB Shaun Ewing Sept 02, 1941 00:00
  • No labels
US-2254589-A // Pulse delay relay // Aamodt Thoralf // Bell Telephone Labor Inc
PDF File 2254378.pdf 472 kB Shaun Ewing Sept 02, 1941 00:00
  • No labels
US-2254378-A // Telephone system // Mallina Rudolph F. // Bell Telephone Labor Inc
  1. Prev
  2. 1
  3. 67
  4. 68
  5. 69
  6. 70
  7. 71
  8. 72
  9. 73
  10. 74
  11. 75
  12. 76
  13. 77
  14. 78
  15. 79
  16. 89
  17. Next