Name Size Creator Creation Date Labels Comment  
PDF File 2206385.pdf 639 kB Shaun Ewing Jul 02, 1940 00:00
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US-2206385-A // Telephone system // Allen Lawrence H. // Bell Telephone Labor Inc
PDF File 2206410.pdf 356 kB Shaun Ewing Jul 02, 1940 00:00
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US-2206410-A // Core for forming concrete conduits // Lally William J. // Bell Telephone Labor Inc
PDF File 2206423.pdf 708 kB Shaun Ewing Jul 02, 1940 00:00
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US-2206423-A // Telegraph system // Nyquist Harry // Bell Telephone Labor Inc
PDF File 2206452.pdf 1.03 MB Shaun Ewing Jul 02, 1940 00:00
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US-2206452-A // Telegraph testing system // Cory Samuel I. // Bell Telephone Labor Inc
PDF File 2206538.pdf 920 kB Shaun Ewing Jul 02, 1940 00:00
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US-2206538-A // Telephone system // Rhodes William A. // Bell Telephone Labor Inc
PDF File 2206544.pdf 960 kB Shaun Ewing Jul 02, 1940 00:00
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US-2206544-A // Telephone system // Jr. John Davidson, // Bell Telephone Labor Inc
PDF File 2206659.pdf 1.22 MB Shaun Ewing Jul 02, 1940 00:00
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US-2206659-A // Communication system // Bonorden Allen R. // Bell Telephone Labor Inc
PDF File 2206663.pdf 1.77 MB Shaun Ewing Jul 02, 1940 00:00
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US-2206663-A // Telegraph system // Cramer Walter W. ; Kinkead Fullerton S. // Bell Telephone Labor Inc
PDF File 2206896.pdf 1.25 MB Shaun Ewing Jul 09, 1940 00:00
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US-2206896-A // Radiant energy distance measuring system // Higgins William H. C. ; Newhouse Russell C. // Bell Telephone Labor Inc
PDF File 2207253.pdf 737 kB Shaun Ewing Jul 09, 1940 00:00
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US-2207253-A // Measuring and indicating circuits // Hawks Verl J. // Bell Telephone Labor Inc
PDF File 2207354.pdf 578 kB Shaun Ewing Jul 09, 1940 00:00
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US-2207354-A // Electron discharge apparatus // Pierce John R. // Bell Telephone Labor Inc
PDF File 2207355.pdf 747 kB Shaun Ewing Jul 09, 1940 00:00
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US-2207355-A // Electron discharge device // Shockley William // Bell Telephone Labor Inc
PDF File 2207356.pdf 538 kB Shaun Ewing Jul 09, 1940 00:00
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US-2207356-A // Electron discharge apparatus // Pierce John R. // Bell Telephone Labor Inc
PDF File 2207522.pdf 512 kB Shaun Ewing Jul 09, 1940 00:00
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US-2207522-A // Concentric conductor transmission line // Smith Phillip H. ; Specht Maleolm A. // Bell Telephone Labor Inc
PDF File 2207531.pdf 525 kB Shaun Ewing Jul 09, 1940 00:00
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US-2207531-A // Four-wire signaling circuits // Botsford Nelson // Bell Telephone Labor Inc
PDF File 2207703.pdf 1.40 MB Shaun Ewing Jul 16, 1940 00:00
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US-2207703-A // Time-of-day announcing machine // Smith Percy C. // Bell Telephone Labor Inc
PDF File 2207711.pdf 1.09 MB Shaun Ewing Jul 16, 1940 00:00
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US-2207711-A // Convoy current timing arrangement // Berger Uriah S. ; Melhose Alfred E. // Bell Telephone Labor Inc
PDF File 2207720.pdf 1.44 MB Shaun Ewing Jul 16, 1940 00:00
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US-2207720-A // Communication system // Cole Ira E. ; Melhose Alfred E. // Bell Telephone Labor Inc
PDF File 2207748.pdf 1.20 MB Shaun Ewing Jul 16, 1940 00:00
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US-2207748-A // Regulating system // Meacham Larned A. // Bell Telephone Labor Inc
PDF File 2207841.pdf 813 kB Shaun Ewing Jul 16, 1940 00:00
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US-2207841-A // Electric discharge device // Weinhart Howard W. // Bell Telephone Labor Inc
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