Name Size Creator Creation Date Labels Comment  
PDF File 1538001.pdf 329 kB Shaun Ewing May 19, 1925 00:00
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US-1538001-A // Current-measuring arrangement // Pierce Ralph E. // American Telephone & Telegraph
PDF File 1654645.pdf 328 kB Shaun Ewing Jan 03, 1928 00:00
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US-1654645-A // Recording system // Green Irving Walter // American Telephone & Telegraph
PDF File 1491848.pdf 327 kB Shaun Ewing Apr 29, 1924 00:00
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US-1491848-A // Artificial line // Crisson George // American Telephone & Telegraph
PDF File 1592883.pdf 327 kB Shaun Ewing Jul 20, 1926 00:00
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US-1592883-A // Repeater for transmission lines // Barton Henry A. ; Nyquist Harry // American Telephone & Telegraph
PDF File 1722274.pdf 326 kB Shaun Ewing Jul 30, 1929 00:00
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US-1722274-A // Telautograph system // Clark Alva B. ; Mertz Pierre // American Telephone & Telegraph
PDF File 1689267.pdf 326 kB Shaun Ewing Oct 30, 1928 00:00
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US-1689267-A // Method and apparatus for picture transmission // Weaver Allan // American Telephone & Telegraph
PDF File 1707265.pdf 326 kB Shaun Ewing Apr 02, 1929 00:00
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US-1707265-A // Means for testing lever keys // Hansen Arnold A. // American Telephone & Telegraph
PDF File 1570755.pdf 326 kB Shaun Ewing Jan 26, 1926 00:00
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US-1570755-A // Radio ringing system // Loynes Owen H. // 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 1365710.pdf 325 kB Shaun Ewing Jan 18, 1921 00:00
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US-1365710-A // Collapsible wire-reel // Mcilwain Herbert A. ; Wright John W. // American Telephone & Telegraph
PDF File 1691962.pdf 325 kB Shaun Ewing Nov 20, 1928 00:00
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US-1691962-A // Selective signaling system // Demarest Charles S. // American Telephone & Telegraph
PDF File 1490993.pdf 325 kB Shaun Ewing Apr 22, 1924 00:00
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US-1490993-A // Apparatus and circuits for preventing side tone // Toomey John F. // American Telephone & Telegraph
PDF File 1579283.pdf 324 kB Shaun Ewing Apr 06, 1926 00:00
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US-1579283-A // Multiple-way connection for alpha plurality of lines // Crisson George // American Telephone & Telegraph
PDF File 1718280.pdf 323 kB Shaun Ewing Jun 25, 1929 00:00
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US-1718280-A // Spring-jack connection // Edwards Paul G. // American Telephone & Telegraph
PDF File 1477596.pdf 323 kB Shaun Ewing Dec 18, 1923 00:00
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US-1477596-A // Means for supporting aerial cables // Rhodes Frederick L. // American Telephone & Telegraph
PDF File 1438988.pdf 323 kB Shaun Ewing Dec 19, 1922 00:00
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US-1438988-A // High-frequency translating circuits // Espenschied Lloyd ; Affel Herman A. // American Telephone & Telegraph
PDF File 1708027.pdf 322 kB Shaun Ewing Apr 09, 1929 00:00
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US-1708027-A // Control device for vacuum tubes // Ohl Russell S. // American Telephone & Telegraph
PDF File 1554266.pdf 321 kB Shaun Ewing Sept 22, 1925 00:00
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US-1554266-A // Detecting circuits // Espenschied Lloyd // American Telephone & Telegraph
PDF File 1634286.pdf 321 kB Shaun Ewing Jul 05, 1927 00:00
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US-1634286-A // Telegraph circuits // Herman Joseph // American Telephone & Telegraph
PDF File 1749841.pdf 320 kB Shaun Ewing Mar 11, 1930 00:00
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US-1749841-A // Voice-operated relay equipment // Nyquist Harry // American Telephone & Telegraph
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