Name Size Creator Creation Date Labels Comment  
PDF File 2273433.pdf 717 kB Shaun Ewing Feb 17, 1942 00:00
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US-2273433-A // Cathode ray tube // Bruce Edmond // Bell Telephone Labor Inc
PDF File 2273432.pdf 373 kB Shaun Ewing Feb 17, 1942 00:00
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US-2273432-A // Electron discharge device circuits // Brewer Sherman T. // Bell Telephone Labor Inc
PDF File 2273193.pdf 728 kB Shaun Ewing Feb 17, 1942 00:00
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US-2273193-A // Wave transmission and shaping // Helsing Raymond A. // Bell Telephone Labor Inc
PDF File 2272998.pdf 442 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272998-A // Slow-operate electrical circuit // Bjornson Bjorn G. // Bell Telephone Labor Inc
PDF File 2272994.pdf 1.16 MB Shaun Ewing Feb 10, 1942 00:00
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US-2272994-A // Piezoelectric crystal element // Mason Warren P. // Bell Telephone Labor Inc
PDF File 2272735.pdf 1.30 MB Shaun Ewing Feb 10, 1942 00:00
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US-2272735-A // Transmission system // Bishop Walter M. // Bell Telephone Labor Inc
PDF File 2272731.pdf 788 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272731-A // Electric wave system // Swart Leland K. // Bell Telephone Labor Inc
PDF File 2272712.pdf 344 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272712-A // Electric wave transmission system // Johnson Kenneth S. // Bell Telephone Labor Inc
PDF File 2272701.pdf 302 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272701-A // Electric wave transmission system // Grismore Oscar D. // Bell Telephone Labor Inc
PDF File 2272613.pdf 535 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272613-A // Transmission with level equalizing // Phelps Walter A. // Bell Telephone Labor Inc
PDF File 2272605.pdf 1.49 MB Shaun Ewing Feb 10, 1942 00:00
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US-2272605-A // Electric wave source and amplifier // Heising Raymond A. // Bell Telephone Labor Inc
PDF File 2272590.pdf 466 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272590-A // Pulse regenerator // Jr. Karl D. Swartzel, // Bell Telephone Labor Inc
PDF File 2272452.pdf 492 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272452-A // Transformer // Whittle Horace // Bell Telephone Labor Inc
PDF File 2272432.pdf 263 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272432-A // Electrical connector // Rogie James M. // Bell Telephone Labor Inc
PDF File 2272401.pdf 921 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272401-A // Frequency modulation receiver // Chaffee Joseph G. // Bell Telephone Labor Inc
PDF File 2272389.pdf 380 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272389-A // Unattended mechanical repeater // Affel Herman A. // Bell Telephone Labor Inc
PDF File 2272253.pdf 933 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272253-A // Cable lashing machine // John Everett St. // Bell Telephone Labor Inc
PDF File 2272246.pdf 1.09 MB Shaun Ewing Feb 10, 1942 00:00
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US-2272246-A // Electrical frequency changer // Manley Jack M. // Bell Telephone Labor Inc
PDF File 2272181.pdf 156 kB Shaun Ewing Feb 10, 1942 00:00
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US-2272181-A // Method for forming cast articles from alloys of lead with calcium and metals of similar properties // Bouton George M. ; Schumacher Earle E. // Bell Telephone Labor Inc
PDF File 2271878.pdf 1.82 MB Shaun Ewing Feb 03, 1942 00:00
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US-2271878-A // Telephone system // Wadsworth Paul W. // Bell Telephone Labor Inc
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