Name Size Creator Creation Date Labels Comment  
PDF File 2332073.pdf 633 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332073-A // Electric circuit control // Grierson Cyrus A. W. // Bell Telephone Labor Inc
PDF File 2332091.pdf 533 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332091-A // Ventilating system for telephone booths // Kuhn John J. // Bell Telephone Labor Inc
PDF File 2332102.pdf 342 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332102-A // Negative transconductance tube oscillator // Mason Warren P. // Bell Telephone Labor Inc
PDF File 2332112.pdf 469 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332112-A // Cable ring // Pritchard William T. // Bell Telephone Labor Inc
PDF File 2332120.pdf 318 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332120-A // Mechanical wave filter // Sykes Roger A. // Bell Telephone Labor Inc
PDF File 2332290.pdf 1.41 MB Shaun Ewing Oct 19, 1943 00:00
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US-2332290-A // Communication system // Baumfalk John // Bell Telephone Labor Inc
PDF File 2332338.pdf 317 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332338-A // Contact making device // Jr. Robert Lee Peek, // Bell Telephone Labor Inc
PDF File 2332343.pdf 2.60 MB Shaun Ewing Oct 19, 1943 00:00
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US-2332343-A // Ceramic material // Rigterink Merle D. // Bell Telephone Labor Inc
PDF File 2332430.pdf 963 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332430-A // Two-way telephone system // Berger Uriah S. // Bell Telephone Labor Inc
PDF File 2332448.pdf 783 kB Shaun Ewing Oct 19, 1943 00:00
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US-2332448-A // Telephone system // Inglis Alfred H. // Bell Telephone Labor Inc
PDF File 2332451.pdf 1.09 MB Shaun Ewing Oct 19, 1943 00:00
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US-2332451-A // Telegraph trouble indicator circuit // Marshall Tola A. // Bell Telephone Labor Inc
PDF File 2332494.pdf 512 kB Shaun Ewing Oct 26, 1943 00:00
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US-2332494-A // Signaling system // Babcock Stuart M. ; Jr. Arthur W. Horton, ; Logan Mason A. // Bell Telephone Labor Inc
PDF File 2332551.pdf 584 kB Shaun Ewing Oct 26, 1943 00:00
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US-2332551-A // Telephone set circuit // Bascom Henry M. // Bell Telephone Labor Inc
PDF File 2332596.pdf 405 kB Shaun Ewing Oct 26, 1943 00:00
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US-2332596-A // Resistor device // Pearson Gerald L. // Bell Telephone Labor Inc
PDF File 2332622.pdf 2.43 MB Shaun Ewing Oct 26, 1943 00:00
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US-2332622-A // Electron discharge device // Calbick Chester J. // Bell Telephone Labor Inc
PDF File 2332643.pdf 837 kB Shaun Ewing Oct 26, 1943 00:00
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US-2332643-A // Telephone set circuit // Johnson Kenneth S. // Bell Telephone Labor Inc
PDF File 2332645.pdf 1.32 MB Shaun Ewing Oct 26, 1943 00:00
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US-2332645-A // Station selecting system // Keithley Joseph F. ; Knandel George J. // Bell Telephone Labor Inc
PDF File 2332872.pdf 416 kB Shaun Ewing Oct 26, 1943 00:00
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US-2332872-A // Station circuit // Shann Oscar A. // Bell Telephone Labor Inc
PDF File 2332878.pdf 1.23 MB Shaun Ewing Oct 26, 1943 00:00
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US-2332878-A // Dial operated crossbar selector // Vroom Edward // Bell Telephone Labor Inc
PDF File 2332907.pdf 663 kB Shaun Ewing Oct 26, 1943 00:00
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US-2332907-A // Signaling system // Fritschi Walter W. // Bell Telephone Labor Inc
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