Name Size Creator Creation Date Labels Comment  
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 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 1763057.pdf 462 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763057-A // Regulator system // Krom Myron E. // Bell Telephone Labor Inc
PDF File 1763043.pdf 317 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763043-A // Loading of conductors // Gilbert John J. // Bell Telephone Labor Inc
PDF File 1763036.pdf 2.05 MB Shaun Ewing Jun 10, 1930 00:00
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US-1763036-A // Trunking system // Entz Ferdinand S. // Bell Telephone Labor Inc
PDF File 1763017.pdf 548 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763017-A // Regulator system // Stoller Hugh M. // Bell Telephone Labor Inc
PDF File 1763015.pdf 827 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763015-A // Operation of electric space-discharge devices // Stevenson George H. // Bell Telephone Labor Inc
PDF File 1763014.pdf 547 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763014-A // Regulator system // Stacy Leland J. ; Krom Myron E. // Bell Telephone Labor Inc
PDF File 1763008.pdf 263 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763008-A // Electromagnetic device // Priessman Neil Y. // Bell Telephone Labor Inc
PDF File 1763006.pdf 297 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763006-A // Telephone-exchange equipment // Murphy Paul G. // Bell Telephone Labor Inc
PDF File 1763003.pdf 381 kB Shaun Ewing Jun 10, 1930 00:00
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US-1763003-A // Electromagnetic device // Mead Edward D. // Bell Telephone Labor Inc
PDF File 1762999.pdf 585 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762999-A // Regulator system // Manderfeld Emanuel C. // Bell Telephone Labor Inc
PDF File 1762996.pdf 364 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762996-A // Loading of signaling conductors // Legg Victor E. // Bell Telephone Labor Inc
PDF File 1762991.pdf 240 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762991-A // Electromagnetic reproducer or recorder // Jones Warren C. // Bell Telephone Labor Inc
PDF File 1762986.pdf 1.19 MB Shaun Ewing Jun 10, 1930 00:00
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US-1762986-A // Telephone system // Hinrichsen Edward E. // Bell Telephone Labor Inc
PDF File 1762984.pdf 398 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762984-A // Secret-communicating system // Heising Raymond A. // Bell Telephone Labor Inc
PDF File 1762981.pdf 486 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762981-A // Acoustic device // Hartley Ralph V. L. // Bell Telephone Labor Inc
PDF File 1762973.pdf 568 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762973-A // Alarm system // Frederick Halsey Augustus // Bell Telephone Labor Inc
PDF File 1762971.pdf 855 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762971-A // Remote-control power system // Field Joseph C. // Bell Telephone Labor Inc
PDF File 1762968.pdf 480 kB Shaun Ewing Jun 10, 1930 00:00
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US-1762968-A // Composite conductor // Farnsworth Frank F. // Bell Telephone Labor Inc
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