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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2157326.pdf | 1.07 MB | Shaun Ewing | May 09, 1939 00:00 |
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US-2157326-A // Signal transmission system // Jr. Stephen Doba, // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.07 MB | Shaun Ewing | May 09, 1939 00:00 | US-2157326-A // Signal transmission system // Jr. Stephen Doba, // Bell Telephone Labor Inc | ||||
| PDF File 2157336.pdf | 924 kB | Shaun Ewing | May 09, 1939 00:00 |
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US-2157336-A // Electron discharge apparatus // Heising Raymond A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 924 kB | Shaun Ewing | May 09, 1939 00:00 | US-2157336-A // Electron discharge apparatus // Heising Raymond A. // Bell Telephone Labor Inc | ||||
| PDF File 2157694.pdf | 784 kB | Shaun Ewing | May 09, 1939 00:00 |
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US-2157694-A // Transmission level control // Fisher Harold J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 784 kB | Shaun Ewing | May 09, 1939 00:00 | US-2157694-A // Transmission level control // Fisher Harold J. // Bell Telephone Labor Inc | ||||
| PDF File 2157703.pdf | 696 kB | Shaun Ewing | May 09, 1939 00:00 |
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US-2157703-A // Piezoelectric apparatus // Hovgaard Ole M. ; Koerner Lawrence F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 696 kB | Shaun Ewing | May 09, 1939 00:00 | US-2157703-A // Piezoelectric apparatus // Hovgaard Ole M. ; Koerner Lawrence F. // Bell Telephone Labor Inc | ||||
| PDF File 2157870.pdf | 666 kB | Shaun Ewing | May 09, 1939 00:00 |
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US-2157870-A // High frequency circuit and apparatus // Sowers Nelson E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 666 kB | Shaun Ewing | May 09, 1939 00:00 | US-2157870-A // High frequency circuit and apparatus // Sowers Nelson E. // Bell Telephone Labor Inc | ||||
| PDF File 2157890.pdf | 442 kB | Shaun Ewing | May 09, 1939 00:00 |
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US-2157890-A // Switching device // Dehn Joseph W. ; Myers Oscar // Bell Telephone Labor Inc | |||
| Version 1 (current) | 442 kB | Shaun Ewing | May 09, 1939 00:00 | US-2157890-A // Switching device // Dehn Joseph W. ; Myers Oscar // Bell Telephone Labor Inc | ||||
| PDF File 2158113.pdf | 1.65 MB | Shaun Ewing | May 16, 1939 00:00 |
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US-2158113-A // Teletypewriter trunking system // Fitch Karl F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.65 MB | Shaun Ewing | May 16, 1939 00:00 | US-2158113-A // Teletypewriter trunking system // Fitch Karl F. // Bell Telephone Labor Inc | ||||
| PDF File 2158132.pdf | 480 kB | Shaun Ewing | May 16, 1939 00:00 |
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US-2158132-A // Magnet body and process of making the same // Legg Victor E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 480 kB | Shaun Ewing | May 16, 1939 00:00 | US-2158132-A // Magnet body and process of making the same // Legg Victor E. // Bell Telephone Labor Inc | ||||
| PDF File 2158492.pdf | 1.02 MB | Shaun Ewing | May 16, 1939 00:00 |
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US-2158492-A // Undersea cable system // Bishop Walter M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.02 MB | Shaun Ewing | May 16, 1939 00:00 | US-2158492-A // Undersea cable system // Bishop Walter M. // Bell Telephone Labor Inc | ||||
| PDF File 2158516.pdf | 384 kB | Shaun Ewing | May 16, 1939 00:00 |
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US-2158516-A // Protective device for electrical apparatus // Meintash Frank H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 384 kB | Shaun Ewing | May 16, 1939 00:00 | US-2158516-A // Protective device for electrical apparatus // Meintash Frank H. // Bell Telephone Labor Inc | ||||
| PDF File 2158993.pdf | 1.10 MB | Shaun Ewing | May 23, 1939 00:00 |
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US-2158993-A // Signal transmission system // Abraham Leonard G. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.10 MB | Shaun Ewing | May 23, 1939 00:00 | US-2158993-A // Signal transmission system // Abraham Leonard G. // Bell Telephone Labor Inc | ||||
| PDF File 2159020.pdf | 565 kB | Shaun Ewing | May 23, 1939 00:00 |
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US-2159020-A // Modulating system // Ferrell Enoch B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 565 kB | Shaun Ewing | May 23, 1939 00:00 | US-2159020-A // Modulating system // Ferrell Enoch B. // Bell Telephone Labor Inc | ||||
| PDF File 2159595.pdf | 1.86 MB | Shaun Ewing | May 23, 1939 00:00 |
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US-2159595-A // Frequency conversion circuits // Miller Ralph L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.86 MB | Shaun Ewing | May 23, 1939 00:00 | US-2159595-A // Frequency conversion circuits // Miller Ralph L. // Bell Telephone Labor Inc | ||||
| PDF File 2159596.pdf | 825 kB | Shaun Ewing | May 23, 1939 00:00 |
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US-2159596-A // Frequency conversion circuits // Miller Ralph L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 825 kB | Shaun Ewing | May 23, 1939 00:00 | US-2159596-A // Frequency conversion circuits // Miller Ralph L. // Bell Telephone Labor Inc | ||||
| PDF File 2159597.pdf | 650 kB | Shaun Ewing | May 23, 1939 00:00 |
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US-2159597-A // Frequency conversion circuits // Miller Ralph L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 650 kB | Shaun Ewing | May 23, 1939 00:00 | US-2159597-A // Frequency conversion circuits // Miller Ralph L. // Bell Telephone Labor Inc | ||||
| PDF File 2159747.pdf | 540 kB | Shaun Ewing | May 23, 1939 00:00 |
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US-2159747-A // Glow discharge device // Mendenhall Hallam E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 540 kB | Shaun Ewing | May 23, 1939 00:00 | US-2159747-A // Glow discharge device // Mendenhall Hallam E. // Bell Telephone Labor Inc | ||||
| PDF File 2159751.pdf | 286 kB | Shaun Ewing | May 23, 1939 00:00 |
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US-2159751-A // Signaling system // Saul George N. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 286 kB | Shaun Ewing | May 23, 1939 00:00 | US-2159751-A // Signaling system // Saul George N. // Bell Telephone Labor Inc | ||||
| PDF File 2160017.pdf | 459 kB | Shaun Ewing | May 30, 1939 00:00 |
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US-2160017-A // Signaling system // Hearn Richard B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 459 kB | Shaun Ewing | May 30, 1939 00:00 | US-2160017-A // Signaling system // Hearn Richard B. // Bell Telephone Labor Inc | ||||
| PDF File 2160086.pdf | 742 kB | Shaun Ewing | May 30, 1939 00:00 |
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US-2160086-A // Electron discharge device // Ronci Victor L. ; West John W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 742 kB | Shaun Ewing | May 30, 1939 00:00 | US-2160086-A // Electron discharge device // Ronci Victor L. ; West John W. // Bell Telephone Labor Inc | ||||
| PDF File 2160383.pdf | 408 kB | Shaun Ewing | May 30, 1939 00:00 |
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US-2160383-A // Light sensitive electric device and circuit therefor // Kannenberg Walter F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 408 kB | Shaun Ewing | May 30, 1939 00:00 | US-2160383-A // Light sensitive electric device and circuit therefor // Kannenberg Walter F. // Bell Telephone Labor Inc |
