Name Size Creator Creation Date Labels Comment  
PDF File 1801348.pdf 469 kB Shaun Ewing Apr 21, 1931 00:00
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US-1801348-A // Automatic call signal and motor control for simplex printers // Hewitt Ernest W. // Western Union Telegraph Co
PDF File 1800195.pdf 461 kB Shaun Ewing Apr 07, 1931 00:00
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US-1800195-A // Tape-feeding mechanism for telegraph printers // Porter James F. ; Franklin Laurence W. // Western Union Telegraph Co
PDF File 1800190.pdf 958 kB Shaun Ewing Apr 07, 1931 00:00
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US-1800190-A // Coupon-feed-control mechanism for keyboard transmitters // Long James W. // Western Union Telegraph Co
PDF File 1800056.pdf 729 kB Shaun Ewing Apr 07, 1931 00:00
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US-1800056-A // Matching speed of receiving rotating element from telegraph code signals // Dirkes Robert F. // Western Union Telegraph Co
PDF File 1799855.pdf 233 kB Shaun Ewing Apr 07, 1931 00:00
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US-1799855-A // Coupling for pneumatic tubes, etc. // Mample Adolph Z. // Western Union Telegraph Co
PDF File 1797667.pdf 557 kB Shaun Ewing Mar 24, 1931 00:00
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US-1797667-A // Metallic battery supply from grounded sources // Morgenstern Ronald V. // Western Union Telegraph Co
PDF File 1793953.pdf 1.08 MB Shaun Ewing Feb 24, 1931 00:00
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US-1793953-A // Drag conveyer // D'Humy Fernand E. ; Plausics Alexander // Western Union Telegraph Co
PDF File 1793319.pdf 887 kB Shaun Ewing Feb 17, 1931 00:00
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US-1793319-A // Method of multiple transmission // Hoover Ray ; Dirkes Robert F. // Western Union Telegraph Co
PDF File 1790150.pdf 691 kB Shaun Ewing Jan 27, 1931 00:00
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US-1790150-A // Means of phasing // Hoover Ray ; Dirkes Robert F. // Western Union Telegraph Co
PDF File 1788477.pdf 1.17 MB Shaun Ewing Jan 13, 1931 00:00
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US-1788477-A // Interpolating signal in high-speed telegraph circuits // Woodward Marion H. // Western Union Telegraph Co
PDF File 1788316.pdf 786 kB Shaun Ewing Jan 06, 1931 00:00
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US-1788316-A // Superposed telegraph system and bridge duplex set for use with such systems // Morgenstern Ronald V. // Western Union Telegraph Co
PDF File 1786343.pdf 400 kB Shaun Ewing Dec 23, 1930 00:00
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US-1786343-A // Universal drag conveyer // Griffith Francis // Western Union Telegraph Co
PDF File 1784968.pdf 514 kB Shaun Ewing Dec 16, 1930 00:00
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US-1784968-A // Pneumatic-tube system // Mcguinness William V. // Western Union Telegraph Co
PDF File 1784967.pdf 735 kB Shaun Ewing Dec 16, 1930 00:00
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US-1784967-A // Single selector relay for pneumatic-tube systems // Mcguinness William V. // Western Union Telegraph Co
PDF File 1780118.pdf 474 kB Shaun Ewing Oct 28, 1930 00:00
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US-1780118-A // Combined sectional operating-table unit and conveyer section // D'Humy Fernand E. // Western Union Telegraph Co
PDF File 1778679.pdf 1.25 MB Shaun Ewing Oct 14, 1930 00:00
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US-1778679-A // Call-distributing system // Light George G. ; Drake Herbert W. ; Rudd Maurice A. ; Blanton William B. // Western Union Telegraph Co
PDF File 1776697.pdf 771 kB Shaun Ewing Sept 23, 1930 00:00
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US-1776697-A // Multiple sending and receiving device for pneumatic-tube systems // Mcguinness William V. ; Chulstrom John M. ; Francis William H. // Western Union Telegraph Co
PDF File 1776219.pdf 240 kB Shaun Ewing Sept 16, 1930 00:00
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US-1776219-A // Signal-relay system // Fluharty William G. // Western Union Telegraph Co
PDF File 1776068.pdf 278 kB Shaun Ewing Sept 16, 1930 00:00
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US-1776068-A // Selective pneumatic-tube carrier // Francis William H. // Western Union Telegraph Co
PDF File 1775687.pdf 671 kB Shaun Ewing Sept 16, 1930 00:00
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US-1775687-A // Measuring the efficiency of telegraph transmission // Milnor Joseph W. ; Bramhall Fay B. // Western Union Telegraph Co
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