Name Size Creator Creation Date Labels Comment  
PDF File 2222652.pdf 217 kB Shaun Ewing Nov 26, 1940 00:00
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US-2222652-A // Method of suspending aerial cables // Carr James A. // Bell Telephone Labor Inc
PDF File 2222425.pdf 777 kB Shaun Ewing Nov 19, 1940 00:00
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US-2222425-A // Magnetic structure // Wehe Herman G. // Bell Telephone Labor Inc
PDF File 2222417.pdf 772 kB Shaun Ewing Nov 19, 1940 00:00
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US-2222417-A // Wave filter // Mason Warren P. // Bell Telephone Labor Inc
PDF File 2222248.pdf 293 kB Shaun Ewing Nov 19, 1940 00:00
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US-2222248-A // Ringing system // Blount Frank E. // Bell Telephone Labor Inc
PDF File 2221956.pdf 374 kB Shaun Ewing Nov 19, 1940 00:00
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US-2221956-A // Sound recording compositions // Schuh Arthur E. // Bell Telephone Labor Inc
PDF File 2221833.pdf 352 kB Shaun Ewing Nov 19, 1940 00:00
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US-2221833-A // System for measuring contact rebounding // Cory Samuel I. // Bell Telephone Labor Inc
PDF File 2221390.pdf 298 kB Shaun Ewing Nov 12, 1940 00:00
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US-2221390-A // Apparatus for and a method of making coils // Thompson William J. // Bell Telephone Labor Inc
PDF File 2220942.pdf 1.53 MB Shaun Ewing Nov 12, 1940 00:00
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US-2220942-A // Acoustic device // Morrison Louis A. ; Mott Edward E. // Bell Telephone Labor Inc
PDF File 2220931.pdf 9.39 MB Shaun Ewing Nov 12, 1940 00:00
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US-2220931-A // Telegraph system // Krecek Joseph A. // Bell Telephone Labor Inc
PDF File 2220889.pdf 1.31 MB Shaun Ewing Nov 12, 1940 00:00
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US-2220889-A // Communication system // Cole Ira E. // Bell Telephone Labor Inc
PDF File 2220883.pdf 1.22 MB Shaun Ewing Nov 12, 1940 00:00
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US-2220883-A // Circuit controller // Gerger Uriah S. ; Curtis Austen M. // Bell Telephone Labor Inc
PDF File 2220168.pdf 302 kB Shaun Ewing Nov 05, 1940 00:00
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US-2220168-A // Coin collection apparatus // Melick John M. // Bell Telephone Labor Inc
PDF File 2220143.pdf 702 kB Shaun Ewing Nov 05, 1940 00:00
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US-2220143-A // Electromagnetic switching device // Buch Peter E. ; Knowlton Clarence S. // Bell Telephone Labor Inc
PDF File 2220088.pdf 528 kB Shaun Ewing Nov 05, 1940 00:00
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US-2220088-A // Reed type voice frequency generator // Dowey Thomas L. // Bell Telephone Labor Inc
PDF File 2219751.pdf 825 kB Shaun Ewing Oct 29, 1940 00:00
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US-2219751-A // Single side band diversity radio receiving system // Polkinghorn Frank A. // Bell Telephone Labor Inc
PDF File 2219749.pdf 734 kB Shaun Ewing Oct 29, 1940 00:00
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US-2219749-A // Single side band diversity radio receiving system // Oswald Arthur A. // Bell Telephone Labor Inc
PDF File 2219459.pdf 876 kB Shaun Ewing Oct 29, 1940 00:00
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US-2219459-A // Power plant // Spencer Harry H. // Bell Telephone Labor Inc
PDF File 2219451.pdf 402 kB Shaun Ewing Oct 29, 1940 00:00
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US-2219451-A // Locking device // Mccormick Charles G. // Bell Telephone Labor Inc
PDF File 2219365.pdf 403 kB Shaun Ewing Oct 29, 1940 00:00
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US-2219365-A // Electrical resistance device and method of manufacture thereof // Janssen William F. // Bell Telephone Labor Inc
PDF File 2219189.pdf 358 kB Shaun Ewing Oct 22, 1940 00:00
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US-2219189-A // Frequency selective amplifier // Lundstrom Alexis A. // Bell Telephone Labor Inc
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