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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| 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 | |||
| Version 1 (current) | 4.20 MB | Shaun Ewing | Jun 24, 1930 00:00 | US-1767961-A // Automatic telephone-exchange system // Clark Edgar H. ; Carpenter Warren W. // Bell Telephone Labor Inc | ||||
| PDF File 1780906.pdf | 4.09 MB | Shaun Ewing | Nov 11, 1930 00:00 |
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US-1780906-A // Automatic toll-switching telephone system // Carpenter Warren W. ; Hersey Ralph E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 4.09 MB | Shaun Ewing | Nov 11, 1930 00:00 | US-1780906-A // Automatic toll-switching telephone system // Carpenter Warren W. ; Hersey Ralph E. // Bell Telephone Labor Inc | ||||
| PDF File 1767960.pdf | 4.05 MB | Shaun Ewing | Jun 24, 1930 00:00 |
|
US-1767960-A // Automatic telephone exchange // Clark Edgar H. ; Carpenter Warren W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 4.05 MB | Shaun Ewing | Jun 24, 1930 00:00 | US-1767960-A // Automatic telephone exchange // 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 | |||
| Version 1 (current) | 3.83 MB | Shaun Ewing | Jun 24, 1930 00:00 | US-1767962-A // Automatic telephone-exchange system // Clark Edgar H. ; Carpenter Warren W. // 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 | |||
| Version 1 (current) | 3.65 MB | Shaun Ewing | Jun 24, 1930 00:00 | US-1767959-A // Automatic telephone-exchange system // Clark Edgar H. ; Carpenter Warren W. // Bell Telephone Labor Inc | ||||
| PDF File 1753348.pdf | 3.58 MB | Shaun Ewing | Apr 08, 1930 00:00 |
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US-1753348-A // Monitoring system // Newsom James B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 3.58 MB | Shaun Ewing | Apr 08, 1930 00:00 | US-1753348-A // Monitoring system // Newsom James B. // Bell Telephone Labor Inc | ||||
| PDF File 1742916.pdf | 3.50 MB | Shaun Ewing | Jan 07, 1930 00:00 |
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US-1742916-A // Telephone-exchange system // Irvine Frank S. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 3.50 MB | Shaun Ewing | Jan 07, 1930 00:00 | US-1742916-A // Telephone-exchange system // Irvine Frank S. // Bell Telephone Labor Inc | ||||
| PDF File 1742920.pdf | 3.28 MB | Shaun Ewing | Jan 07, 1930 00:00 |
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US-1742920-A // Telephone-exchange system // Matthies William H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 3.28 MB | Shaun Ewing | Jan 07, 1930 00:00 | US-1742920-A // Telephone-exchange system // Matthies William H. // Bell Telephone Labor Inc | ||||
| PDF File 1708983.pdf | 2.98 MB | Shaun Ewing | Apr 16, 1929 00:00 |
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US-1708983-A // Telephone system // Vroom Edward ; Entz Ferdinand S. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.98 MB | Shaun Ewing | Apr 16, 1929 00:00 | US-1708983-A // Telephone system // Vroom Edward ; Entz Ferdinand S. // Bell Telephone Labor Inc | ||||
| PDF File 1689328.pdf | 2.59 MB | Shaun Ewing | Oct 30, 1928 00:00 |
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US-1689328-A // Submarine telegraph system // Curtis Austen M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.59 MB | Shaun Ewing | Oct 30, 1928 00:00 | US-1689328-A // Submarine telegraph system // Curtis Austen M. // Bell Telephone Labor Inc | ||||
| PDF File 1705891.pdf | 2.59 MB | Shaun Ewing | Mar 19, 1929 00:00 |
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US-1705891-A // Power line signaling // Arnold Henry B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.59 MB | Shaun Ewing | Mar 19, 1929 00:00 | US-1705891-A // Power line signaling // Arnold Henry B. // Bell Telephone Labor Inc | ||||
| PDF File 1696271.pdf | 2.48 MB | Shaun Ewing | Dec 25, 1928 00:00 |
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US-1696271-A // Call-charging telephone-exchange system // Hague Alfred E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.48 MB | Shaun Ewing | Dec 25, 1928 00:00 | US-1696271-A // Call-charging telephone-exchange system // Hague Alfred E. // Bell Telephone Labor Inc | ||||
| PDF File 1738302.pdf | 2.46 MB | Shaun Ewing | Dec 03, 1929 00:00 |
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US-1738302-A // Telephone system // Krecek Joseph A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.46 MB | Shaun Ewing | Dec 03, 1929 00:00 | US-1738302-A // Telephone system // Krecek Joseph A. // Bell Telephone Labor Inc | ||||
| PDF File 1681489.pdf | 2.40 MB | Shaun Ewing | Aug 21, 1928 00:00 |
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US-1681489-A // Signaling system // Locke George A. ; Haglund Hakon H. // Bell Telephone Labor Inc ; Western Union Telegraph Co | |||
| Version 1 (current) | 2.40 MB | Shaun Ewing | Aug 21, 1928 00:00 | US-1681489-A // Signaling system // Locke George A. ; Haglund Hakon H. // Bell Telephone Labor Inc ; Western Union Telegraph Co | ||||
| PDF File 1675886.pdf | 2.28 MB | Shaun Ewing | Jul 03, 1928 00:00 |
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US-1675886-A // Telephone system // Hague Alfred E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.28 MB | Shaun Ewing | Jul 03, 1928 00:00 | US-1675886-A // Telephone system // Hague Alfred E. // Bell Telephone Labor Inc | ||||
| PDF File 1738245.pdf | 2.24 MB | Shaun Ewing | Dec 03, 1929 00:00 |
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US-1738245-A // Telephone system // Hinrichsen Edward E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.24 MB | Shaun Ewing | Dec 03, 1929 00:00 | US-1738245-A // Telephone system // Hinrichsen Edward E. // 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 | |||
| Version 1 (current) | 2.05 MB | Shaun Ewing | Jun 10, 1930 00:00 | US-1763036-A // Trunking system // Entz Ferdinand S. // Bell Telephone Labor Inc | ||||
| PDF File 1687883.pdf | 1.98 MB | Shaun Ewing | Oct 16, 1928 00:00 |
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US-1687883-A // Transmission system // O'Neill Henry W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.98 MB | Shaun Ewing | Oct 16, 1928 00:00 | US-1687883-A // Transmission system // O'Neill Henry W. // Bell Telephone Labor Inc | ||||
| PDF File 1688993.pdf | 1.93 MB | Shaun Ewing | Oct 23, 1928 00:00 |
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US-1688993-A // Telephone system // Smith Edmund B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.93 MB | Shaun Ewing | Oct 23, 1928 00:00 | US-1688993-A // Telephone system // Smith Edmund B. // 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 | |||
| Version 1 (current) | 1.93 MB | Shaun Ewing | Jun 17, 1930 00:00 | US-1763893-A // Telephone system // Krecek Joseph A. // Bell Telephone Labor Inc |
