Name Size Creator Creation Date Labels Comment  
PDF File 1840109.pdf 2.70 MB Shaun Ewing Jan 05, 1932 00:00
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US-1840109-A // Telephone system // Koechling Charles D. // Bell Telephone Labor Inc
PDF File 2202921.pdf 2.70 MB Shaun Ewing Jun 04, 1940 00:00
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US-2202921-A // Trouble recorder // Powell Albert C. // Bell Telephone Labor Inc
PDF File 1952835.pdf 2.67 MB Shaun Ewing Mar 27, 1934 00:00
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US-1952835-A // Telephone system // Blake Foster B. // Bell Telephone Labor Inc
PDF File 1952870.pdf 2.67 MB Shaun Ewing Mar 27, 1934 00:00
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US-1952870-A // Telephone system // Jordan William C. // Bell Telephone Labor Inc
PDF File 1841093.pdf 2.66 MB Shaun Ewing Jan 12, 1932 00:00
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US-1841093-A // Call distributing system // Dahl Jack F. // Bell Telephone Labor Inc
PDF File 1830219.pdf 2.61 MB Shaun Ewing Nov 03, 1931 00:00
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US-1830219-A // Transmission control // Bjornson Bjorn G. // Bell Telephone Labor Inc
PDF File 1832447.pdf 2.59 MB Shaun Ewing Nov 17, 1931 00:00
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US-1832447-A // Telephone system // Carpenter Warren W. // Bell Telephone Labor Inc
PDF File 1866260.pdf 2.59 MB Shaun Ewing Jul 05, 1932 00:00
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US-1866260-A // Telephone system // King Gerald V. ; Bonomi Felix A. // Bell Telephone Laboratcries In
PDF File 2042562.pdf 2.55 MB Shaun Ewing Jun 02, 1936 00:00
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US-2042562-A // Telephone system // Stokely Ray L. // Bell Telephone Labor Inc
PDF File 1823679.pdf 2.55 MB Shaun Ewing Sept 15, 1931 00:00
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US-1823679-A // Call charging telephone exchange system // Busch Aloysius J. // Bell Telephone Labor Inc
PDF File 2173551.pdf 2.55 MB Shaun Ewing Sept 19, 1939 00:00
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US-2173551-A // Communication system // Fitch Karl E. // Bell Telephone Labor Inc
PDF File 2217198.pdf 2.53 MB Shaun Ewing Oct 08, 1940 00:00
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US-2217198-A // Cathode ray device // Davisson Clinton J. // Bell Telephone Labor Inc
PDF File 1992271.pdf 2.50 MB Shaun Ewing Feb 26, 1935 00:00
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US-1992271-A // Automatic stock quotation system // Williams Samuel B. // Bell Telephone Labor Inc
PDF File 1841197.pdf 2.49 MB Shaun Ewing Jan 12, 1932 00:00
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US-1841197-A // Telephone alarm system // Massonneau Robert F. ; Roberts Thomas H. // Bell Telephone Labor Inc
PDF File 2089438.pdf 2.48 MB Shaun Ewing Aug 10, 1937 00:00
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US-2089438-A // Telephone system // Scudder Frederick J. // Bell Telephone Labor Inc
PDF File 1816887.pdf 2.45 MB Shaun Ewing Aug 04, 1931 00:00
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US-1816887-A // Automatic article selecting and distributing system // Adams Edgar W. // Bell Telephone Labor Inc
PDF File 1863292.pdf 2.44 MB Shaun Ewing Jun 14, 1932 00:00
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US-1863292-A // Telephone system // Whitney Wiley // Bell Telephone Labor Inc
PDF File 1960037.pdf 2.43 MB Shaun Ewing May 22, 1934 00:00
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US-1960037-A // Telephone system // Williams Samuel B. ; Scndder Frederick J. // Bell Telephone Labor Inc
PDF File 2034846.pdf 2.43 MB Shaun Ewing Mar 24, 1936 00:00
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US-2034846-A // Telephone system // Stokely Ray L. // Bell Telephone Labor Inc
PDF File 1788528.pdf 2.40 MB Shaun Ewing Jan 13, 1931 00:00
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US-1788528-A // Telephone system // Koechling Charles D. // Bell Telephone Labor Inc
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