Name Size Creator Creation Date Labels Comment  
PDF File 1860446.pdf 1.20 MB Shaun Ewing May 31, 1932 00:00
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US-1860446-A // Signaling system // Bailey Rand S. ; Newby Neal D. ; Moody Dwight L. // American Telephone & Telegraph
PDF File 1860007.pdf 311 kB Shaun Ewing May 24, 1932 00:00
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US-1860007-A // Telephone office alarm circuit // Bascom Henry M. // American Telephone & Telegraph
PDF File 1859498.pdf 727 kB Shaun Ewing May 24, 1932 00:00
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US-1859498-A // Vacuum tube control system // Carpe Allen // American Telephone & Telegraph
PDF File 1859404.pdf 1.09 MB Shaun Ewing May 24, 1932 00:00
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US-1859404-A // Telephone exchange system // Mcdavitt Marcellus B. // American Telephone & Telegraph
PDF File 1859390.pdf 445 kB Shaun Ewing May 24, 1932 00:00
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US-1859390-A // Concentric conductor system // Green Estill I. // American Telephone & Telegraph
PDF File 1859386.pdf 488 kB Shaun Ewing May 24, 1932 00:00
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US-1859386-A // Telephone system // Edwards William H. // American Telephone & Telegraph
PDF File 1859385.pdf 568 kB Shaun Ewing May 24, 1932 00:00
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US-1859385-A // Telephone system // Edwards William H. // American Telephone & Telegraph
PDF File 1858364.pdf 832 kB Shaun Ewing May 17, 1932 00:00
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US-1858364-A // Multiple slide wire potentiometer // Jr. Walter Koenig, // American Telephone & Telegraph
PDF File 1858350.pdf 408 kB Shaun Ewing May 17, 1932 00:00
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US-1858350-A // Printing telegraph system // Weaver Allan // American Telephone & Telegraph
PDF File 1858339.pdf 374 kB Shaun Ewing May 17, 1932 00:00
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US-1858339-A // Piezo electric oscillator // Ohl Russell S. // American Telephone & Telegraph
PDF File 1858338.pdf 407 kB Shaun Ewing May 17, 1932 00:00
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US-1858338-A // Means for compensating for nonlinear distortion in transmission circuits // Nyquist Harry // American Telephone & Telegraph
PDF File 1858307.pdf 570 kB Shaun Ewing May 17, 1932 00:00
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US-1858307-A // Means for compensating for nonlinear distortion in transmission circuits // Nyquist Harry // American Telephone & Telegraph
PDF File 1857259.pdf 1.12 MB Shaun Ewing May 10, 1932 00:00
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US-1857259-A // Transmission system // Rea Wilton T. // American Telephone & Telegraph
PDF File 1857258.pdf 683 kB Shaun Ewing May 10, 1932 00:00
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US-1857258-A // Transmission system // Rea Wilton T. // American Telephone & Telegraph
PDF File 1857238.pdf 402 kB Shaun Ewing May 10, 1932 00:00
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US-1857238-A // Transmission system // Cory Samuel I. // American Telephone & Telegraph
PDF File 1856224.pdf 889 kB Shaun Ewing May 03, 1932 00:00
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US-1856224-A // Telegraph communication system // Perry Donald B. // American Telephone & Telegraph
PDF File 1856213.pdf 415 kB Shaun Ewing May 03, 1932 00:00
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US-1856213-A // Radio receiving apparatus // Hamilton Baxter P. ; Rea Wilton T. // American Telephone & Telegraph
PDF File 1856204.pdf 462 kB Shaun Ewing May 03, 1932 00:00
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US-1856204-A // Coaxial conductor system // Affel Herman A. ; Green Estill I. // American Telephone & Telegraph
PDF File 1856202.pdf 967 kB Shaun Ewing May 03, 1932 00:00
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US-1856202-A // Testing apparatus // Wilson Leon T. // American Telephone & Telegraph
PDF File 1855321.pdf 217 kB Shaun Ewing Apr 26, 1932 00:00
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US-1855321-A // Gas pressure alarm system for toll cables // Shackleton Samuel P. // American Telephone & Telegraph
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