Name Size Creator Creation Date Labels Comment  
PDF File 2108640.pdf 432 kB Shaun Ewing Feb 15, 1938 00:00
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US-2108640-A // Electron discharge apparatus // Bieling Carl A. // Bell Telephone Labor Inc
PDF File 1938726.pdf 432 kB Shaun Ewing Dec 12, 1933 00:00
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US-1938726-A // Electromagnetic device // Slauson William C. // Bell Telephone Labor Inc
PDF File 1987445.pdf 432 kB Shaun Ewing Jan 08, 1935 00:00
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US-1987445-A // Electrodynamic device // Kalin Walter // Bell Telephone Labor Inc
PDF File 2189546.pdf 432 kB Shaun Ewing Feb 06, 1940 00:00
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US-2189546-A // Transmission system // Edson James O. // Bell Telephone Labor Inc
PDF File 2055187.pdf 431 kB Shaun Ewing Sept 22, 1936 00:00
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US-2055187-A // Phonograph reproducer // Vieth Leonard // Bell Telephone Labor Inc
PDF File 1827191.pdf 431 kB Shaun Ewing Oct 13, 1931 00:00
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US-1827191-A // Shielded inductance // Casper William L. // Bell Telephone Labor Inc
PDF File 1934378.pdf 431 kB Shaun Ewing Nov 07, 1933 00:00
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US-1934378-A // Electric discharge device // Ronci Victor L. ; Depew Charles // Bell Telephone Labor Inc
PDF File 1901901.pdf 431 kB Shaun Ewing Mar 21, 1933 00:00
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US-1901901-A // Testing of electrical contacts // Dixon John B. ; Honan Edward M. // Bell Telephone Labor Inc
PDF File 1983528.pdf 431 kB Shaun Ewing Dec 11, 1934 00:00
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US-1983528-A // Carrier line system // Black Harold S. // Bell Telephone Labor Inc
PDF File 1951916.pdf 431 kB Shaun Ewing Mar 20, 1934 00:00
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US-1951916-A // Printing telegraph exchange system // Lane Cuthbert C. // Bell Telephone Labor Inc
PDF File 2181579.pdf 431 kB Shaun Ewing Nov 28, 1939 00:00
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US-2181579-A // Signal transmission line // Curtis Austen M. // Bell Telephone Labor Inc
PDF File 1868321.pdf 430 kB Shaun Ewing Jul 19, 1932 00:00
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US-1868321-A // Sound recording // Harrison Henry C. // Bell Telephone Labor Inc
PDF File 1836569.pdf 430 kB Shaun Ewing Dec 15, 1931 00:00
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US-1836569-A // Electric translating device // Benjamin John C. // Bell Telephone Labor Inc
PDF File 1835802.pdf 430 kB Shaun Ewing Dec 08, 1931 00:00
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US-1835802-A // Signaling system // Meszar John // Bell Telephone Labor Inc
PDF File 2213320.pdf 429 kB Shaun Ewing Sept 03, 1940 00:00
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US-2213320-A // Privacy system // Mathes Robert C. ; Peterson Eugene ; Dudley Homer W. // Bell Telephone Labor Inc
PDF File 1970926.pdf 429 kB Shaun Ewing Aug 21, 1934 00:00
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US-1970926-A // Sound radiator // Wente Edward C. // Bell Telephone Labor Inc
PDF File 2103489.pdf 429 kB Shaun Ewing Dec 28, 1937 00:00
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US-2103489-A // Amplifier circuit // Peterson Eugene // Bell Telephone Labor Inc
PDF File 2110433.pdf 429 kB Shaun Ewing Mar 08, 1938 00:00
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US-2110433-A // Take-up device for telephone switchboard cords // Yost Lloyd A. // Bell Telephone Labor Inc
PDF File 2167254.pdf 428 kB Shaun Ewing Jul 25, 1939 00:00
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US-2167254-A // Piezoelectric vibrator oscillator // Skellett Albert M. // Bell Telephone Labor Inc
PDF File 2025075.pdf 428 kB Shaun Ewing Dec 24, 1935 00:00
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US-2025075-A // Electron discharge device // Samuel Arthur L. // Bell Telephone Labor Inc
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