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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1714525.pdf | 877 kB | Shaun Ewing | May 28, 1929 00:00 |
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US-1714525-A // Suppression of echoes and singing in four-wire circuits // Silent Harold C. // American Telephone & Telegraph | |||
| Version 1 (current) | 877 kB | Shaun Ewing | May 28, 1929 00:00 | US-1714525-A // Suppression of echoes and singing in four-wire circuits // Silent Harold C. // American Telephone & Telegraph | ||||
| PDF File 1781124.pdf | 874 kB | Shaun Ewing | Nov 11, 1930 00:00 |
|
US-1781124-A // Concentric conducting system // Nein Harry R. // American Telephone & Telegraph | |||
| Version 1 (current) | 874 kB | Shaun Ewing | Nov 11, 1930 00:00 | US-1781124-A // Concentric conducting system // Nein Harry R. // American Telephone & Telegraph | ||||
| PDF File 1428631.pdf | 873 kB | Shaun Ewing | Sept 12, 1922 00:00 |
|
US-1428631-A // Testing and adjusting apparatus for cord circuits // Harrison William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 873 kB | Shaun Ewing | Sept 12, 1922 00:00 | US-1428631-A // Testing and adjusting apparatus for cord circuits // Harrison William H. // American Telephone & Telegraph | ||||
| PDF File 1549849.pdf | 872 kB | Shaun Ewing | Aug 18, 1925 00:00 |
|
US-1549849-A // Voice frequency carrier telegraph // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 872 kB | Shaun Ewing | Aug 18, 1925 00:00 | US-1549849-A // Voice frequency carrier telegraph // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1546439.pdf | 871 kB | Shaun Ewing | Jul 21, 1925 00:00 |
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US-1546439-A // Secret telephone system // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 871 kB | Shaun Ewing | Jul 21, 1925 00:00 | US-1546439-A // Secret telephone system // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1677967.pdf | 871 kB | Shaun Ewing | Jul 24, 1928 00:00 |
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US-1677967-A // Radio signaling system // Holden William H. T. // American Telephone & Telegraph | |||
| Version 1 (current) | 871 kB | Shaun Ewing | Jul 24, 1928 00:00 | US-1677967-A // Radio signaling system // Holden William H. T. // American Telephone & Telegraph | ||||
| PDF File 1541881.pdf | 870 kB | Shaun Ewing | Jun 16, 1925 00:00 |
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US-1541881-A // Single polar telegraph circuits // Watson Edward F. // American Telephone & Telegraph | |||
| Version 1 (current) | 870 kB | Shaun Ewing | Jun 16, 1925 00:00 | US-1541881-A // Single polar telegraph circuits // Watson Edward F. // American Telephone & Telegraph | ||||
| PDF File 1700180.pdf | 868 kB | Shaun Ewing | Jan 29, 1929 00:00 |
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US-1700180-A // Selective telegraph system // Roberts Leland Clifford // American Telephone & Telegraph | |||
| Version 1 (current) | 868 kB | Shaun Ewing | Jan 29, 1929 00:00 | US-1700180-A // Selective telegraph system // Roberts Leland Clifford // American Telephone & Telegraph | ||||
| PDF File 1565343.pdf | 867 kB | Shaun Ewing | Dec 15, 1925 00:00 |
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US-1565343-A // Printing-telegraph-exchange system // Vernam Gilbert S. ; Perry Donald B. // American Telephone & Telegraph | |||
| Version 1 (current) | 867 kB | Shaun Ewing | Dec 15, 1925 00:00 | US-1565343-A // Printing-telegraph-exchange system // Vernam Gilbert S. ; Perry Donald B. // American Telephone & Telegraph | ||||
| PDF File 1428667.pdf | 865 kB | Shaun Ewing | Sept 12, 1922 00:00 |
|
US-1428667-A // Testing and adjusting apparatus for cord circuits // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 865 kB | Shaun Ewing | Sept 12, 1922 00:00 | US-1428667-A // Testing and adjusting apparatus for cord circuits // Toomey John F. // American Telephone & Telegraph | ||||
| PDF File 1444830.pdf | 864 kB | Shaun Ewing | Feb 13, 1923 00:00 |
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US-1444830-A // Transmission-controlling apparatus // Demarest Charles S. // American Telephone & Telegraph | |||
| Version 1 (current) | 864 kB | Shaun Ewing | Feb 13, 1923 00:00 | US-1444830-A // Transmission-controlling apparatus // Demarest Charles S. // American Telephone & Telegraph | ||||
| PDF File 1576579.pdf | 860 kB | Shaun Ewing | Mar 16, 1926 00:00 |
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US-1576579-A // Ground-potential-neutralizing system // Cory Samuel I. // American Telephone & Telegraph | |||
| Version 1 (current) | 860 kB | Shaun Ewing | Mar 16, 1926 00:00 | US-1576579-A // Ground-potential-neutralizing system // Cory Samuel I. // American Telephone & Telegraph | ||||
| PDF File 1609394.pdf | 859 kB | Shaun Ewing | Dec 07, 1926 00:00 |
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US-1609394-A // Telephone system // Bailey Rand S. // American Telephone & Telegraph | |||
| Version 1 (current) | 859 kB | Shaun Ewing | Dec 07, 1926 00:00 | US-1609394-A // Telephone system // Bailey Rand S. // American Telephone & Telegraph | ||||
| PDF File 1713039.pdf | 858 kB | Shaun Ewing | May 14, 1929 00:00 |
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US-1713039-A // Phonograph recording and reproducing // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 858 kB | Shaun Ewing | May 14, 1929 00:00 | US-1713039-A // Phonograph recording and reproducing // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1534660.pdf | 856 kB | Shaun Ewing | Apr 21, 1925 00:00 |
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US-1534660-A // System of telegraphic distribution // Potts Louis M. // American Telephone & Telegraph | |||
| Version 1 (current) | 856 kB | Shaun Ewing | Apr 21, 1925 00:00 | US-1534660-A // System of telegraphic distribution // Potts Louis M. // American Telephone & Telegraph | ||||
| PDF File 1648079.pdf | 855 kB | Shaun Ewing | Nov 08, 1927 00:00 |
|
US-1648079-A // Testing system for telephone cord circuits // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 855 kB | Shaun Ewing | Nov 08, 1927 00:00 | US-1648079-A // Testing system for telephone cord circuits // Toomey John F. // American Telephone & Telegraph | ||||
| PDF File 1643323.pdf | 851 kB | Shaun Ewing | Sept 27, 1927 00:00 |
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US-1643323-A // Directive antenna array // Stone John Stone // American Telephone & Telegraph | |||
| Version 1 (current) | 851 kB | Shaun Ewing | Sept 27, 1927 00:00 | US-1643323-A // Directive antenna array // Stone John Stone // American Telephone & Telegraph | ||||
| PDF File 1502813.pdf | 851 kB | Shaun Ewing | Jul 29, 1924 00:00 |
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US-1502813-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 851 kB | Shaun Ewing | Jul 29, 1924 00:00 | US-1502813-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1587610.pdf | 851 kB | Shaun Ewing | Jun 08, 1926 00:00 |
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US-1587610-A // Telephone-exchange system // Smith Roy H. // American Telephone & Telegraph | |||
| Version 1 (current) | 851 kB | Shaun Ewing | Jun 08, 1926 00:00 | US-1587610-A // Telephone-exchange system // Smith Roy H. // American Telephone & Telegraph | ||||
| PDF File 1556319.pdf | 851 kB | Shaun Ewing | Oct 06, 1925 00:00 |
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US-1556319-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 851 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1556319-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph |
