Name Size Creator Creation Date Labels Comment  
PDF File 1763060.pdf 160 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763060-A // Telephone-exchange equipment // Meyer Delbert C. // Bell Telephone Labor Inc
PDF File 1763157.pdf 587 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763157-A // Telephone system // King Gerald V. // Bell Telephone Labor Inc
PDF File 1763161.pdf 917 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763161-A // Telephone system // Koechling Charles D. ; King Gerald V. // Bell Telephone Labor Inc
PDF File 1763169.pdf 740 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763169-A // Sound recording // Mathes Robert C. // Bell Telephone Labor Inc
PDF File 1763172.pdf 208 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763172-A // Electro-polarized relay // Miller Ohmer R. ; Mead Edward D. // Bell Telephone Labor Inc
PDF File 1763194.pdf 1000 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763194-A // Communication system // Sivian Leon J. // Bell Telephone Labor Inc
PDF File 1763203.pdf 742 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763203-A // Remote-control system // Vieth William F. // Bell Telephone Labor Inc
PDF File 1763880.pdf 525 kB Shaun Ewing Jun 17, 1930 00:00
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US-1763880-A // Signaling system // Burton Everett T. // Bell Telephone Labor Inc
PDF File 1763891.pdf 173 kB Shaun Ewing Jun 17, 1930 00:00
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US-1763891-A // Sound recording // Jones Warren C. // Bell Telephone Labor Inc
PDF File 1763893.pdf 1.93 MB Shaun Ewing Jun 17, 1930 00:00
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US-1763893-A // Telephone system // Krecek Joseph A. // Bell Telephone Labor Inc
PDF File 1763909.pdf 874 kB Shaun Ewing Jun 17, 1930 00:00
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US-1763909-A // Speed regulator // Stoller Hugh M. ; Morton Edmund R. // Bell Telephone Labor Inc
PDF File 1765396.pdf 313 kB Shaun Ewing Jun 24, 1930 00:00
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US-1765396-A // Indicating system // Betts Philander H. // Bell Telephone Labor Inc
PDF File 1765523.pdf 385 kB Shaun Ewing Jun 24, 1930 00:00
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US-1765523-A // Signal-transmission system // Ceccarini Olindo O. // Bell Telephone Labor Inc
PDF File 1766473.pdf 1.06 MB Shaun Ewing Jun 24, 1930 00:00
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US-1766473-A // Electrodynamic device // Wente Edward C. // Bell Telephone Labor Inc
PDF File 1767929.pdf 1.46 MB Shaun Ewing Jun 24, 1930 00:00
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US-1767929-A // Telephone system // Johnson Herbert B. // Bell Telephone Labor Inc
PDF File 1767959.pdf 3.65 MB Shaun Ewing Jun 24, 1930 00:00
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US-1767959-A // Automatic telephone-exchange system // Clark Edgar H. ; Carpenter Warren W. // Bell Telephone Labor Inc
PDF File 1767960.pdf 4.05 MB Shaun Ewing Jun 24, 1930 00:00
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US-1767960-A // Automatic telephone exchange // Clark Edgar H. ; Carpenter Warren W. // Bell Telephone Labor Inc
PDF File 1767961.pdf 4.20 MB Shaun Ewing Jun 24, 1930 00:00
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US-1767961-A // Automatic telephone-exchange system // Clark Edgar H. ; Carpenter Warren W. // Bell Telephone Labor Inc
PDF File 1767962.pdf 3.83 MB Shaun Ewing Jun 24, 1930 00:00
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US-1767962-A // Automatic telephone-exchange system // Clark Edgar H. ; Carpenter Warren W. // Bell Telephone Labor Inc
PDF File 1767964.pdf 361 kB Shaun Ewing Jun 24, 1930 00:00
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US-1767964-A // Vacuum-tube circuits // Cousins Van Meter // Bell Telephone Labor Inc
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