Name Size Creator Creation Date Labels Comment  
PDF File 1776311.pdf 557 kB Shaun Ewing Sept 23, 1930 00:00
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US-1776311-A // Repeater system // Crisson George // American Telephone & Telegraph
PDF File 1776310.pdf 914 kB Shaun Ewing Sept 23, 1930 00:00
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US-1776310-A // Two-way negative-impedance repeater // Crisson George // American Telephone & Telegraph
PDF File 1776301.pdf 193 kB Shaun Ewing Sept 23, 1930 00:00
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US-1776301-A // Coin-controlled apparatus // Thompson George K. // American Telephone & Telegraph
PDF File 1775775.pdf 391 kB Shaun Ewing Sept 16, 1930 00:00
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US-1775775-A // Method of and means for wave retardation // Nyquist Harry // American Telephone & Telegraph
PDF File 1775752.pdf 230 kB Shaun Ewing Sept 16, 1930 00:00
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US-1775752-A // Oscillation generator // Edwards William H. // American Telephone & Telegraph
PDF File 1775742.pdf 285 kB Shaun Ewing Sept 16, 1930 00:00
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US-1775742-A // Sheet-mounting device // Thomson William Harold // American Telephone & Telegraph
PDF File 1773798.pdf 1.16 MB Shaun Ewing Aug 26, 1930 00:00
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US-1773798-A // Carrier-current telegraph system // Thorp Vaughn P. // American Telephone & Telegraph
PDF File 1773789.pdf 374 kB Shaun Ewing Aug 26, 1930 00:00
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US-1773789-A // Carrier-current telegraph system // Rea Wilton T. // American Telephone & Telegraph
PDF File 1773785.pdf 411 kB Shaun Ewing Aug 26, 1930 00:00
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US-1773785-A // Electrooptical system // Nyquist Harry // American Telephone & Telegraph
PDF File 1773776.pdf 252 kB Shaun Ewing Aug 26, 1930 00:00
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US-1773776-A // Telephone conference arrangement // Crisson George // American Telephone & Telegraph
PDF File 1773772.pdf 396 kB Shaun Ewing Aug 26, 1930 00:00
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US-1773772-A // Harmonic suppressor // Berthold Oscar H. // American Telephone & Telegraph
PDF File 1773126.pdf 637 kB Shaun Ewing Aug 19, 1930 00:00
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US-1773126-A // Transmission system // Affel Herman A. // American Telephone & Telegraph
PDF File 1773119.pdf 724 kB Shaun Ewing Aug 19, 1930 00:00
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US-1773119-A // Electrooptical transmission system // Reynolds Frederick W. // American Telephone & Telegraph
PDF File 1773116.pdf 620 kB Shaun Ewing Aug 19, 1930 00:00
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US-1773116-A // Single-side-band system // Potter Ralph K. // American Telephone & Telegraph
PDF File 1773097.pdf 973 kB Shaun Ewing Aug 19, 1930 00:00
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US-1773097-A // Staggered-wave antenna system // Dean Samuel W. // American Telephone & Telegraph
PDF File 1773092.pdf 326 kB Shaun Ewing Aug 19, 1930 00:00
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US-1773092-A // Carrier telegraph circuits // Clapp Robert H. // American Telephone & Telegraph
PDF File 1772552.pdf 280 kB Shaun Ewing Aug 12, 1930 00:00
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US-1772552-A // Echo suppressor // Mitchell Doren ; Herman Joseph // American Telephone & Telegraph
PDF File 1772551.pdf 259 kB Shaun Ewing Aug 12, 1930 00:00
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US-1772551-A // Echo suppressor // Mitchell Doren ; Silent Harold C. // American Telephone & Telegraph
PDF File 1772550.pdf 449 kB Shaun Ewing Aug 12, 1930 00:00
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US-1772550-A // Echo suppressor // Mitchell Doren ; Silent Harold C. // American Telephone & Telegraph
PDF File 1772519.pdf 646 kB Shaun Ewing Aug 12, 1930 00:00
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US-1772519-A // Electrooptical transmission // Potter Ralph K. // American Telephone & Telegraph
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