Name Size Creator Creation Date Labels Comment  
PDF File 2055638.pdf 1.88 MB Shaun Ewing Sept 29, 1936 00:00
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US-2055638-A // Communication system // Staples Elliot M. // Bell Telephone Labor Inc
PDF File 1986534.pdf 1.87 MB Shaun Ewing Jan 01, 1935 00:00
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US-1986534-A // Apparatus for coating electrical conductors // Ronci Victor L. ; Wilson James R. ; Depew Charles // Bell Telephone Labor Inc
PDF File 1895828.pdf 1.87 MB Shaun Ewing Jan 31, 1933 00:00
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US-1895828-A // Wire splicing machine // Jr. Charles L. Van Inwagen, // Bell Telephone Labor Inc
PDF File 2170397.pdf 1.86 MB Shaun Ewing Aug 22, 1939 00:00
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US-2170397-A // Signal transmission system // Bjornson Bjorn G. ; Bryant Newton W. // Bell Telephone Labor Inc
PDF File 1859941.pdf 1.86 MB Shaun Ewing May 24, 1932 00:00
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US-1859941-A // Telephone exchange system // Stokely Ray L. // Bell Telephone Labor Inc
PDF File 2159595.pdf 1.86 MB Shaun Ewing May 23, 1939 00:00
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US-2159595-A // Frequency conversion circuits // Miller Ralph L. // Bell Telephone Labor Inc
PDF File 2087326.pdf 1.85 MB Shaun Ewing Jul 20, 1937 00:00
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US-2087326-A // Standard frequency system // Marrison Warren A. // Bell Telephone Labor Inc
PDF File 2161864.pdf 1.85 MB Shaun Ewing Jun 13, 1939 00:00
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US-2161864-A // Telephone system // Hersey Ralph E. // Bell Telephone Labor Inc
PDF File 2173589.pdf 1.84 MB Shaun Ewing Sept 19, 1939 00:00
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US-2173589-A // Piezoelectric apparatus // Mason Warren P. ; Sykes Roger A. // Bell Telephone Labor Inc
PDF File 2037471.pdf 1.83 MB Shaun Ewing Apr 14, 1936 00:00
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US-2037471-A // Electrooptical system // Ives Herbert E. ; Gray Frank // Bell Telephone Labor Inc
PDF File 1926880.pdf 1.82 MB Shaun Ewing Sept 12, 1933 00:00
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US-1926880-A // Transmission control in two-way signaling systems // Norwine Andrew C. // Bell Telephone Labor Inc
PDF File 1788513.pdf 1.82 MB Shaun Ewing Jan 13, 1931 00:00
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US-1788513-A // Signal and control system // Fultz Miles E. // Bell Telephone Labor Inc
PDF File 2173924.pdf 1.81 MB Shaun Ewing Sept 26, 1939 00:00
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US-2173924-A // Telephone system // Toomey John F. // Bell Telephone Labor Inc
PDF File 1855593.pdf 1.81 MB Shaun Ewing Apr 26, 1932 00:00
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US-1855593-A // Telephone system // Whitney Wiley // Bell Telephone Labor Inc
PDF File 2020875.pdf 1.80 MB Shaun Ewing Nov 12, 1935 00:00
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US-2020875-A // Energization and control of amplifiers // Burton Everett T. // Bell Telephone Labor Inc
PDF File 1841123.pdf 1.80 MB Shaun Ewing Jan 12, 1932 00:00
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US-1841123-A // Telephone exchange system // Hovland Henry // Bell Telephone Labor Inc
PDF File 2136602.pdf 1.80 MB Shaun Ewing Nov 15, 1938 00:00
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US-2136602-A // Teletypewriter projector // Atkins George E. // Bell Telephone Labor Inc
PDF File 1868296.pdf 1.79 MB Shaun Ewing Jul 19, 1932 00:00
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US-1868296-A // Automatic telephone system // Stokely Ray L. // Bell Telephone Labor Inc
PDF File 2217197.pdf 1.79 MB Shaun Ewing Oct 08, 1940 00:00
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US-2217197-A // Cathode ray device // Davisson Clinton J. // Bell Telephone Labor Inc
PDF File 2196867.pdf 1.79 MB Shaun Ewing Apr 09, 1940 00:00
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US-2196867-A // Television image producing system // Knoop William A. // Bell Telephone Labor Inc
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