Name Size Creator Creation Date Labels Comment  
PDF File 1972326.pdf 697 kB Shaun Ewing Sept 04, 1934 00:00
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US-1972326-A // System for automatically detecting errors in telegraph reception // Angel Herbert // Western Union Telegraph Co
PDF File 2048311.pdf 696 kB Shaun Ewing Jul 21, 1936 00:00
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US-2048311-A // Tape feed for printed strips // Yorke George M. ; Dirkes Robert F. // Western Union Telegraph Co
PDF File 2294148.pdf 695 kB Shaun Ewing Aug 25, 1942 00:00
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US-2294148-A // Method of and means for recording signals // Kline Bernard L. ; Rudd Maurice A. // Western Union Telegraph Co
PDF File 2299895.pdf 694 kB Shaun Ewing Oct 27, 1942 00:00
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US-2299895-A // Friction testing machine // Harrall Edwin R. ; Reis John P. // Western Union Telegraph Co
PDF File 1836575.pdf 693 kB Shaun Ewing Dec 15, 1931 00:00
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US-1836575-A // Method of neutralizing disturbing frequencies in communication circuits // Cannon William D. // Western Union Telegraph Co
PDF File 2341935.pdf 692 kB Shaun Ewing Feb 15, 1944 00:00
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US-2341935-A // Telegraph apparatus // Maus Frank J. ; Rothermel Samuel W. // Western Union Telegraph Co
PDF File 1738427.pdf 692 kB Shaun Ewing Dec 03, 1929 00:00
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US-1738427-A // Conveyer system // Griffith Francis ; Birkmeyer Paul J. ; Life Harold G. // Western Union Telegraph Co
PDF File 2078902.pdf 691 kB Shaun Ewing Apr 27, 1937 00:00
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US-2078902-A // Call box // Demonet Eugene A. // 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 1704389.pdf 689 kB Shaun Ewing Mar 05, 1929 00:00
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US-1704389-A // Messenger call box // Janson George W. // Western Union Telegraph Co
PDF File 2198781.pdf 686 kB Shaun Ewing Apr 30, 1940 00:00
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US-2198781-A // Reverse current switch // Mample Adolph Z. // Western Union Telegraph Co
PDF File 2145786.pdf 685 kB Shaun Ewing Jan 31, 1939 00:00
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US-2145786-A // Conveyer belt // Birkmeyer Paul J. // Western Union Telegraph Co
PDF File 2205430.pdf 684 kB Shaun Ewing Jun 25, 1940 00:00
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US-2205430-A // Printing telegraph apparatus // Noxon Paul A. ; Mitchell James I. // Western Union Telegraph Co
PDF File 583418.pdf 684 kB Shaun Ewing May 25, 1897 00:00
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US-583418-A // Telegraphy // Oliver R. Roberson, Op New Jersey // Western Union Telegraph Co, Op New York.
PDF File 1973041.pdf 682 kB Shaun Ewing Sept 11, 1934 00:00
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US-1973041-A // Drag conveyer and belt // Birkmeyer Paul J. // Western Union Telegraph Co
PDF File 1881458.pdf 681 kB Shaun Ewing Oct 11, 1932 00:00
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US-1881458-A // Telegraph receiving or repeating circuit // Frost Albert E. // Western Union Telegraph Co
PDF File 1969440.pdf 678 kB Shaun Ewing Aug 07, 1934 00:00
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US-1969440-A // Telegraph recording and projecting system // Wheeler Evan R. ; Dirkes Robert F. // Western Union Telegraph Co
PDF File 1254829.pdf 677 kB Shaun Ewing Jan 29, 1918 00:00
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US-1254829-A // Means for compensating for disturbances of earth potential. // Joseph W. Milnor // Western Union Telegraph Co
PDF File 1657384.pdf 676 kB Shaun Ewing Jan 24, 1928 00:00
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US-1657384-A // Telegraph system // Foster Lee R. // Western Union Telegraph Co
PDF File 1969692.pdf 675 kB Shaun Ewing Aug 07, 1934 00:00
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US-1969692-A // Telegraph printing system // Dirkes Robert F. // Western Union Telegraph Co
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