Name Size Creator Creation Date Labels Comment  
PDF File 2188154.pdf 498 kB Shaun Ewing Jan 23, 1940 00:00
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US-2188154-A // Piezoelectric substance and process for producing it // Morgan Stanley O. // Bell Telephone Labor Inc
PDF File 2117739.pdf 497 kB Shaun Ewing May 17, 1938 00:00
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US-2117739-A // Signaling system // Miller Ralph L. // Bell Telephone Labor Inc
PDF File 1918977.pdf 497 kB Shaun Ewing Jul 18, 1933 00:00
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US-1918977-A // Synchronous motor // Marrison Warren A. // Bell Telephone Labor Inc
PDF File 2188659.pdf 497 kB Shaun Ewing Jan 30, 1940 00:00
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US-2188659-A // Selector switch brush // Hickman Clarence N. // Bell Telephone Labor Inc
PDF File 2002204.pdf 497 kB Shaun Ewing May 21, 1935 00:00
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US-2002204-A // Process of treating gutta percha // Ingmanson John H. ; Mueller George S. // Bell Telephone Labor Inc
PDF File 2182968.pdf 496 kB Shaun Ewing Dec 12, 1939 00:00
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US-2182968-A // Method of making electrical connections // Lunsford Robert L. // Bell Telephone Labor Inc
PDF File 2188164.pdf 496 kB Shaun Ewing Jan 23, 1940 00:00
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US-2188164-A // Ground potential compensator // Sutiff Carleton B. // Bell Telephone Labor Inc
PDF File 2023592.pdf 496 kB Shaun Ewing Dec 10, 1935 00:00
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US-2023592-A // Coin chute // Hoyt Frederick A. // Bell Telephone Labor Inc
PDF File 2094044.pdf 496 kB Shaun Ewing Sept 28, 1937 00:00
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US-2094044-A // Wave filter // Mason Warren P. // Bell Telephone Labor Inc
PDF File 2092509.pdf 495 kB Shaun Ewing Sept 07, 1937 00:00
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US-2092509-A // Telephone booth // Hampton Leon N. ; Smith Albert K. // Bell Telephone Labor Inc
PDF File 2114016.pdf 495 kB Shaun Ewing Apr 12, 1938 00:00
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US-2114016-A // Electrical counting system // Dimond Thomas L. // Bell Telephone Labor Inc
PDF File 1940095.pdf 495 kB Shaun Ewing Dec 19, 1933 00:00
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US-1940095-A // Coin collector // Melick John M. // Bell Telephone Labor Inc
PDF File 2031951.pdf 495 kB Shaun Ewing Feb 25, 1936 00:00
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US-2031951-A // Burglar alarm system // Hartley Ralph V. L. // Bell Telephone Labor Inc
PDF File 2037183.pdf 495 kB Shaun Ewing Apr 14, 1936 00:00
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US-2037183-A // Carrier line power supply // Strieby Maurice E. // Bell Telephone Labor Inc
PDF File 2046705.pdf 495 kB Shaun Ewing Jul 07, 1936 00:00
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US-2046705-A // Electromagnetic device // Stoller Hugh M. // Bell Telephone Labor Inc
PDF File 2196049.pdf 494 kB Shaun Ewing Apr 02, 1940 00:00
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US-2196049-A // Latch apparatus // Andres Robert R. // Bell Telephone Labor Inc
PDF File 1909367.pdf 493 kB Shaun Ewing May 16, 1933 00:00
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US-1909367-A // Heat treating loaded conductors // Legg Victor E. // Bell Telephone Labor Inc
PDF File 1999351.pdf 493 kB Shaun Ewing Apr 30, 1935 00:00
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US-1999351-A // Electron discharge device // Baker Carl I. // Bell Telephone Labor Inc
PDF File 2052298.pdf 493 kB Shaun Ewing Aug 25, 1936 00:00
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US-2052298-A // Electrooptical system // Ives Herbert E. // Bell Telephone Labor Inc
PDF File 2187115.pdf 492 kB Shaun Ewing Jan 16, 1940 00:00
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US-2187115-A // Switching device // Ellwood Walter B. ; Holden William H. T. // Bell Telephone Labor Inc
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