Name Size Creator Creation Date Labels Comment  
PDF File 2285022.pdf 605 kB Shaun Ewing Jun 02, 1942 00:00
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US-2285022-A // Telephone substation apparatus // Edwards William H. // Bell Telephone Labor Inc
PDF File 2285034.pdf 379 kB Shaun Ewing Jun 02, 1942 00:00
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US-2285034-A // Cover for cable terminal housings // Kelsay Le Roy W. // Bell Telephone Labor Inc
PDF File 2285451.pdf 1.44 MB Shaun Ewing Jun 09, 1942 00:00
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US-2285451-A // Automatic control system // Melhose Alfred E. // Bell Telephone Labor Inc
PDF File 2285512.pdf 422 kB Shaun Ewing Jun 09, 1942 00:00
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US-2285512-A // Stapling machine // Harley Joseph J. // Bell Telephone Labor Inc
PDF File 2285524.pdf 1.30 MB Shaun Ewing Jun 09, 1942 00:00
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US-2285524-A // Telephone system // Logan Mason A. // Bell Telephone Labor Inc
PDF File 2285565.pdf 495 kB Shaun Ewing Jun 09, 1942 00:00
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US-2285565-A // Directive antenna // Brucc Edmond // Bell Telephone Labor Inc
PDF File 2285657.pdf 695 kB Shaun Ewing Jun 09, 1942 00:00
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US-2285657-A // Brush carriage for selector switches // Hickman Clarence N. // Bell Telephone Labor Inc
PDF File 2285794.pdf 995 kB Shaun Ewing Jun 09, 1942 00:00
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US-2285794-A // Control circuits // Barney Harold L. // Bell Telephone Labor Inc
PDF File 2285796.pdf 608 kB Shaun Ewing Jun 09, 1942 00:00
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US-2285796-A // Gaseous discharge device // Beardow George M. // Bell Telephone Labor Inc
PDF File 2285815.pdf 1.10 MB Shaun Ewing Jun 09, 1942 00:00
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US-2285815-A // Signaling system // Holden William H. T. // Bell Telephone Labor Inc
PDF File 2285832.pdf 1.21 MB Shaun Ewing Jun 09, 1942 00:00
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US-2285832-A // Feedback amplifier // Perkins Edwin H. // Bell Telephone Labor Inc
PDF File 2285908.pdf 674 kB Shaun Ewing Jun 09, 1942 00:00
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US-2285908-A // Sender control system // Davis Richard C. ; Dehn Joseph W. // Bell Telephone Labor Inc
PDF File 2285912.pdf 380 kB Shaun Ewing Jun 09, 1942 00:00
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US-2285912-A // Electric unbalance indicator // Monte Robert W. De // Bell Telephone Labor Inc
PDF File 2285972.pdf 1.08 MB Shaun Ewing Jun 09, 1942 00:00
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US-2285972-A // Telephone system // Holden William H. T. ; Hubbard Francis A. ; Martin William H. // Bell Telephone Labor Inc
PDF File 2285985.pdf 1.19 MB Shaun Ewing Jun 09, 1942 00:00
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US-2285985-A // Step-by-step operated crossbar switch // King Gerald V. // Bell Telephone Labor Inc
PDF File 2286072.pdf 1.22 MB Shaun Ewing Jun 09, 1942 00:00
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US-2286072-A // Treatment of speech waves for transmission or recording // Dudley Homer W. // Bell Telephone Labor Inc
PDF File 2286135.pdf 335 kB Shaun Ewing Jun 09, 1942 00:00
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US-2286135-A // Impulse mechanism // Kater Joseph A. // Bell Telephone Labor Inc
PDF File 2286142.pdf 1.34 MB Shaun Ewing Jun 09, 1942 00:00
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US-2286142-A // Guard circuit // Lamberty Frederick R. // Bell Telephone Labor Inc
PDF File 2286839.pdf 1.35 MB Shaun Ewing Jun 16, 1942 00:00
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US-2286839-A // Directive antenna system // Schelkunoff Sergei A. // Bell Telephone Labor Inc
PDF File 2287077.pdf 829 kB Shaun Ewing Jun 23, 1942 00:00
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US-2287077-A // Volume range control in signal transmission systems // Abraham Leonard G. // Bell Telephone Labor Inc
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