Name Size Creator Creation Date Labels Comment  
PDF File 1919019.pdf 804 kB Shaun Ewing Jul 18, 1933 00:00
  • No labels
US-1919019-A // Artificial cable and loading coil therefor // Greenidge Ralph M. C. // Bell Telephone Labor Inc
PDF File 2042822.pdf 804 kB Shaun Ewing Jun 02, 1936 00:00
  • No labels
US-2042822-A // Telephone transmitter // Bennett Arthur F. ; Tuffnell William L. // Bell Telephone Labor Inc
PDF File 1896480.pdf 804 kB Shaun Ewing Feb 07, 1933 00:00
  • No labels
US-1896480-A // Balanced inductance device // Christopher Arthur J. // Bell Telephone Labor Inc
PDF File 2180365.pdf 803 kB Shaun Ewing Nov 21, 1939 00:00
  • No labels
US-2180365-A // Sweep circuits // Norton Frank R. // Bell Telephone Labor Inc
PDF File 2038222.pdf 803 kB Shaun Ewing Apr 21, 1936 00:00
  • No labels
US-2038222-A // Telephone system // King Gerald V. // Bell Telephone Labor Inc
PDF File 2112533.pdf 803 kB Shaun Ewing Mar 29, 1938 00:00
  • No labels
US-2112533-A // Frequency changer system // Kalb Robert M. // Bell Telephone Labor Inc
PDF File 1985013.pdf 802 kB Shaun Ewing Dec 18, 1934 00:00
  • No labels
US-1985013-A // Artificial larynx // Burchett George W. // Bell Telephone Labor Inc
PDF File 2058208.pdf 802 kB Shaun Ewing Oct 20, 1936 00:00
  • No labels
US-2058208-A // Acoustic device // Blattner David G. // Bell Telephone Labor Inc
PDF File 1910982.pdf 801 kB Shaun Ewing May 23, 1933 00:00
  • No labels
US-1910982-A // Stroboscopic system // Broadwell Howard // Bell Telephone Labor Inc
PDF File 2054789.pdf 801 kB Shaun Ewing Sept 22, 1936 00:00
  • No labels
US-2054789-A // Communication system // Chesnut Roy W. ; Crane Ralph E. ; Huber George H. // Bell Telephone Labor Inc
PDF File 1788736.pdf 800 kB Shaun Ewing Jan 13, 1931 00:00
  • No labels
US-1788736-A // Echo-suppressing and energy-limiting circuits // O'Neill Henry W. // Bell Telephone Labor Inc
PDF File 1979026.pdf 800 kB Shaun Ewing Oct 30, 1934 00:00
  • No labels
US-1979026-A // Telegraph system // Dowd Andrew D. // Bell Telephone Labor Inc
PDF File 2033956.pdf 799 kB Shaun Ewing Mar 17, 1936 00:00
  • No labels
US-2033956-A // Electrical transmission circuit // Rumpel Carl H. // Bell Telephone Labor Inc
PDF File 1849643.pdf 799 kB Shaun Ewing Mar 15, 1932 00:00
  • No labels
US-1849643-A // Electric contact device // Seasongood Charles C. ; Mcwilliams Charles W. // Bell Telephone Labor Inc
PDF File 2144839.pdf 798 kB Shaun Ewing Jan 24, 1939 00:00
  • No labels
US-2144839-A // Switch // Forsberg Oscar F. // Bell Telephone Labor Inc
PDF File 2082339.pdf 798 kB Shaun Ewing Jun 01, 1937 00:00
  • No labels
US-2082339-A // Television system // Ives Herbert E. // Bell Telephone Labor Inc
PDF File 1836809.pdf 798 kB Shaun Ewing Dec 15, 1931 00:00
  • No labels
US-1836809-A // Distortion correction in transmission systems // Mason Warren P. // Bell Telephone Labor Inc
PDF File 2167367.pdf 797 kB Shaun Ewing Jul 25, 1939 00:00
  • No labels
US-2167367-A // Electric wave amplifying system // Meyers Stanley T. // Bell Telephone Labor Inc
PDF File 1831391.pdf 796 kB Shaun Ewing Nov 10, 1931 00:00
  • No labels
US-1831391-A // Telephone desk set // Perreault George E. // Bell Telephone Labor Inc
PDF File 2020487.pdf 796 kB Shaun Ewing Nov 12, 1935 00:00
  • No labels
US-2020487-A // Electrical signaling // Wadsworth Paul W. ; Taylor Charles C. // Bell Telephone Labor Inc ; American Telephone & Telegraph
  1. Prev
  2. 1
  3. 43
  4. 44
  5. 45
  6. 46
  7. 47
  8. 48
  9. 49
  10. 50
  11. 51
  12. 52
  13. 53
  14. 54
  15. 55
  16. 150
  17. Next