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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2141282.pdf | 584 kB | Shaun Ewing | Dec 27, 1938 00:00 |
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US-2141282-A // Wave transmission // Southworth George Clark ; Willis French Hoke // American Telephone & Telegraph | |||
| Version 1 (current) | 584 kB | Shaun Ewing | Dec 27, 1938 00:00 | US-2141282-A // Wave transmission // Southworth George Clark ; Willis French Hoke // American Telephone & Telegraph | ||||
| PDF File 2142290.pdf | 258 kB | Shaun Ewing | Jan 03, 1939 00:00 |
|
US-2142290-A // Duct rodding equipment // Slocum Harvey Francis // American Telephone & Telegraph | |||
| Version 1 (current) | 258 kB | Shaun Ewing | Jan 03, 1939 00:00 | US-2142290-A // Duct rodding equipment // Slocum Harvey Francis // American Telephone & Telegraph | ||||
| PDF File 2142339.pdf | 1.16 MB | Shaun Ewing | Jan 03, 1939 00:00 |
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US-2142339-A // Picture broadcasting system // Weaver Allan // American Telephone & Telegraph | |||
| Version 1 (current) | 1.16 MB | Shaun Ewing | Jan 03, 1939 00:00 | US-2142339-A // Picture broadcasting system // Weaver Allan // American Telephone & Telegraph | ||||
| PDF File 2143971.pdf | 879 kB | Shaun Ewing | Jan 17, 1939 00:00 |
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US-2143971-A // Telephone system // Brazelton Roy Melville // American Telephone & Telegraph | |||
| Version 1 (current) | 879 kB | Shaun Ewing | Jan 17, 1939 00:00 | US-2143971-A // Telephone system // Brazelton Roy Melville // American Telephone & Telegraph | ||||
| PDF File 2143992.pdf | 303 kB | Shaun Ewing | Jan 17, 1939 00:00 |
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US-2143992-A // Electrical protective system // Maurer Keith Langdon ; Swart Leland Kasson // American Telephone & Telegraph | |||
| Version 1 (current) | 303 kB | Shaun Ewing | Jan 17, 1939 00:00 | US-2143992-A // Electrical protective system // Maurer Keith Langdon ; Swart Leland Kasson // American Telephone & Telegraph | ||||
| PDF File 2144709.pdf | 706 kB | Shaun Ewing | Jan 24, 1939 00:00 |
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US-2144709-A // Gain adjusting apparatus // Romnes Haakon Ingolf // American Telephone & Telegraph | |||
| Version 1 (current) | 706 kB | Shaun Ewing | Jan 24, 1939 00:00 | US-2144709-A // Gain adjusting apparatus // Romnes Haakon Ingolf // American Telephone & Telegraph | ||||
| PDF File 2144710.pdf | 691 kB | Shaun Ewing | Jan 24, 1939 00:00 |
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US-2144710-A // Gain adjusting apparatus // Romnes Haakon Ingolf // American Telephone & Telegraph | |||
| Version 1 (current) | 691 kB | Shaun Ewing | Jan 24, 1939 00:00 | US-2144710-A // Gain adjusting apparatus // Romnes Haakon Ingolf // American Telephone & Telegraph | ||||
| PDF File 2145618.pdf | 764 kB | Shaun Ewing | Jan 31, 1939 00:00 |
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US-2145618-A // Key // Anderson Emil Nathaniel // American Telephone & Telegraph | |||
| Version 1 (current) | 764 kB | Shaun Ewing | Jan 31, 1939 00:00 | US-2145618-A // Key // Anderson Emil Nathaniel // American Telephone & Telegraph | ||||
| PDF File 2153072.pdf | 641 kB | Shaun Ewing | Apr 04, 1939 00:00 |
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US-2153072-A // Means for suspending aerial cables // Bookout Archie Coleman ; Pitts Frederick Baxter // American Telephone & Telegraph | |||
| Version 1 (current) | 641 kB | Shaun Ewing | Apr 04, 1939 00:00 | US-2153072-A // Means for suspending aerial cables // Bookout Archie Coleman ; Pitts Frederick Baxter // American Telephone & Telegraph | ||||
| PDF File 2153087.pdf | 295 kB | Shaun Ewing | Apr 04, 1939 00:00 |
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US-2153087-A // Mold // Knapp Howard Samuel // American Telephone & Telegraph | |||
| Version 1 (current) | 295 kB | Shaun Ewing | Apr 04, 1939 00:00 | US-2153087-A // Mold // Knapp Howard Samuel // American Telephone & Telegraph | ||||
| PDF File 2153128.pdf | 597 kB | Shaun Ewing | Apr 04, 1939 00:00 |
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US-2153128-A // Selective signaling system // Bachelet Albert E. ; Holden William H. T. // Bell Telephone Labor Inc ; American Telephone & Telegraph | |||
| Version 1 (current) | 597 kB | Shaun Ewing | Apr 04, 1939 00:00 | US-2153128-A // Selective signaling system // Bachelet Albert E. ; Holden William H. T. // Bell Telephone Labor Inc ; American Telephone & Telegraph | ||||
| PDF File 2153706.pdf | 648 kB | Shaun Ewing | Apr 11, 1939 00:00 |
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US-2153706-A // Privacy testing system // Bascom Earle Clark // American Telephone & Telegraph | |||
| Version 1 (current) | 648 kB | Shaun Ewing | Apr 11, 1939 00:00 | US-2153706-A // Privacy testing system // Bascom Earle Clark // American Telephone & Telegraph | ||||
| PDF File 2153728.pdf | 1.41 MB | Shaun Ewing | Apr 11, 1939 00:00 |
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US-2153728-A // Ultra high frequency signaling // Southworth George Clark // American Telephone & Telegraph | |||
| Version 1 (current) | 1.41 MB | Shaun Ewing | Apr 11, 1939 00:00 | US-2153728-A // Ultra high frequency signaling // Southworth George Clark // American Telephone & Telegraph | ||||
| PDF File 2154547.pdf | 918 kB | Shaun Ewing | Apr 18, 1939 00:00 |
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US-2154547-A // Teletypewriter system // Walker Charles R. // American Telephone & Telegraph | |||
| Version 1 (current) | 918 kB | Shaun Ewing | Apr 18, 1939 00:00 | US-2154547-A // Teletypewriter system // Walker Charles R. // American Telephone & Telegraph | ||||
| PDF File 2154579.pdf | 407 kB | Shaun Ewing | Apr 18, 1939 00:00 |
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US-2154579-A // Telephone conference circuit // Parrott John Angell // American Telephone & Telegraph | |||
| Version 1 (current) | 407 kB | Shaun Ewing | Apr 18, 1939 00:00 | US-2154579-A // Telephone conference circuit // Parrott John Angell // American Telephone & Telegraph | ||||
| PDF File 2154592.pdf | 1.21 MB | Shaun Ewing | Apr 18, 1939 00:00 |
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US-2154592-A // Teletypewriter automatic switching system // Watson Edward Fisk // American Telephone & Telegraph | |||
| Version 1 (current) | 1.21 MB | Shaun Ewing | Apr 18, 1939 00:00 | US-2154592-A // Teletypewriter automatic switching system // Watson Edward Fisk // American Telephone & Telegraph | ||||
| PDF File 2154594.pdf | 417 kB | Shaun Ewing | Apr 18, 1939 00:00 |
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US-2154594-A // Multiplex carrier wave transmission // Weaver Myron Alexander // American Telephone & Telegraph | |||
| Version 1 (current) | 417 kB | Shaun Ewing | Apr 18, 1939 00:00 | US-2154594-A // Multiplex carrier wave transmission // Weaver Myron Alexander // American Telephone & Telegraph | ||||
| PDF File 2154886.pdf | 349 kB | Shaun Ewing | Apr 18, 1939 00:00 |
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US-2154886-A // Selective signaling system // Bachelet Albert E. ; Holden William H. T. // Bell Telephone Labor Inc ; American Telephone & Telegraph | |||
| Version 1 (current) | 349 kB | Shaun Ewing | Apr 18, 1939 00:00 | US-2154886-A // Selective signaling system // Bachelet Albert E. ; Holden William H. T. // Bell Telephone Labor Inc ; American Telephone & Telegraph | ||||
| PDF File 2160206.pdf | 328 kB | Shaun Ewing | May 30, 1939 00:00 |
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US-2160206-A // Telegraph system, open morse telegraph key alarm circuit // Hanley Frank Harold // American Telephone & Telegraph | |||
| Version 1 (current) | 328 kB | Shaun Ewing | May 30, 1939 00:00 | US-2160206-A // Telegraph system, open morse telegraph key alarm circuit // Hanley Frank Harold // American Telephone & Telegraph | ||||
| PDF File 2161006.pdf | 330 kB | Shaun Ewing | Jun 06, 1939 00:00 |
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US-2161006-A // Cabscope // Bixel Edward Carl ; Brown Howard D. // American Telephone & Telegraph | |||
| Version 1 (current) | 330 kB | Shaun Ewing | Jun 06, 1939 00:00 | US-2161006-A // Cabscope // Bixel Edward Carl ; Brown Howard D. // American Telephone & Telegraph |
