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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2191547.pdf | 373 kB | Shaun Ewing | Feb 27, 1940 00:00 |
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US-2191547-A // Electric wave amplifying system // Smethurst Joseph O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 373 kB | Shaun Ewing | Feb 27, 1940 00:00 | US-2191547-A // Electric wave amplifying system // Smethurst Joseph O. // Bell Telephone Labor Inc | ||||
| PDF File 2191542.pdf | 394 kB | Shaun Ewing | Feb 27, 1940 00:00 |
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US-2191542-A // Vacuum tube circuits // Robertson Donald D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 394 kB | Shaun Ewing | Feb 27, 1940 00:00 | US-2191542-A // Vacuum tube circuits // Robertson Donald D. // Bell Telephone Labor Inc | ||||
| PDF File 2191167.pdf | 558 kB | Shaun Ewing | Feb 20, 1940 00:00 |
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US-2191167-A // Amplifier // Edson James O. ; Wilson Ira G. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 558 kB | Shaun Ewing | Feb 20, 1940 00:00 | US-2191167-A // Amplifier // Edson James O. ; Wilson Ira G. // Bell Telephone Labor Inc | ||||
| PDF File 2191151.pdf | 362 kB | Shaun Ewing | Feb 20, 1940 00:00 |
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US-2191151-A // Magnetic core with constant permeability // Hale Stuart G. ; Owens Conrad D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 362 kB | Shaun Ewing | Feb 20, 1940 00:00 | US-2191151-A // Magnetic core with constant permeability // Hale Stuart G. ; Owens Conrad D. // Bell Telephone Labor Inc | ||||
| PDF File 2191074.pdf | 397 kB | Shaun Ewing | Feb 20, 1940 00:00 |
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US-2191074-A // Dynamo-electric machine // Herrington Harold W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 397 kB | Shaun Ewing | Feb 20, 1940 00:00 | US-2191074-A // Dynamo-electric machine // Herrington Harold W. // Bell Telephone Labor Inc | ||||
| PDF File 2191065.pdf | 842 kB | Shaun Ewing | Feb 20, 1940 00:00 |
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US-2191065-A // Wave transmission system // Whittle Horace // Bell Telephone Labor Inc | |||
| Version 1 (current) | 842 kB | Shaun Ewing | Feb 20, 1940 00:00 | US-2191065-A // Wave transmission system // Whittle Horace // Bell Telephone Labor Inc | ||||
| PDF File 2190668.pdf | 2.34 MB | Shaun Ewing | Feb 20, 1940 00:00 |
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US-2190668-A // Diode oscillator // Llewellyn Frederick B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.34 MB | Shaun Ewing | Feb 20, 1940 00:00 | US-2190668-A // Diode oscillator // Llewellyn Frederick B. // Bell Telephone Labor Inc | ||||
| PDF File 2190667.pdf | 818 kB | Shaun Ewing | Feb 20, 1940 00:00 |
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US-2190667-A // Permanent magnet alloy // Kelsall George A. ; Nesbitt Ethan A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 818 kB | Shaun Ewing | Feb 20, 1940 00:00 | US-2190667-A // Permanent magnet alloy // Kelsall George A. ; Nesbitt Ethan A. // Bell Telephone Labor Inc | ||||
| PDF File 2190467.pdf | 387 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2190467-A // Telephone substation apparatus // Hamburger Frey // Bell Telephone Labor Inc | |||
| Version 1 (current) | 387 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2190467-A // Telephone substation apparatus // Hamburger Frey // Bell Telephone Labor Inc | ||||
| PDF File 2190466.pdf | 501 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2190466-A // Telephone substation apparatus // Bennett Arthur F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 501 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2190466-A // Telephone substation apparatus // Bennett Arthur F. // Bell Telephone Labor Inc | ||||
| PDF File 2190307.pdf | 869 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2190307-A // Designation transmitter // Bascom Henry M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 869 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2190307-A // Designation transmitter // Bascom Henry M. // Bell Telephone Labor Inc | ||||
| PDF File 2190295.pdf | 604 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2190295-A // Switching device // Miller Robert A. ; Rubly Harry C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 604 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2190295-A // Switching device // Miller Robert A. ; Rubly Harry C. // Bell Telephone Labor Inc | ||||
| PDF File 2189994.pdf | 580 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2189994-A // Telephone system // Reier George C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 580 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2189994-A // Telephone system // Reier George C. // Bell Telephone Labor Inc | ||||
| PDF File 2189944.pdf | 465 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2189944-A // Telephone call transmitter // Field Joseph C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 465 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2189944-A // Telephone call transmitter // Field Joseph C. // Bell Telephone Labor Inc | ||||
| PDF File 2189898.pdf | 1.53 MB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2189898-A // System of communication // Hartley Ralph V. L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.53 MB | Shaun Ewing | Feb 13, 1940 00:00 | US-2189898-A // System of communication // Hartley Ralph V. L. // Bell Telephone Labor Inc | ||||
| PDF File 2189770.pdf | 594 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2189770-A // Piezoelectric controlled oscillator // Samuel Arthur L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 594 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2189770-A // Piezoelectric controlled oscillator // Samuel Arthur L. // Bell Telephone Labor Inc | ||||
| PDF File 2189769.pdf | 296 kB | Shaun Ewing | Feb 13, 1940 00:00 |
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US-2189769-A // Telephone signaling system // Johnston Donald F. ; Shiel John B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 296 kB | Shaun Ewing | Feb 13, 1940 00:00 | US-2189769-A // Telephone signaling system // Johnston Donald F. ; Shiel John B. // Bell Telephone Labor Inc | ||||
| PDF File 2189548.pdf | 657 kB | Shaun Ewing | Feb 06, 1940 00:00 |
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US-2189548-A // Remote control // Gent Edgar W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 657 kB | Shaun Ewing | Feb 06, 1940 00:00 | US-2189548-A // Remote control // Gent Edgar W. // Bell Telephone Labor Inc | ||||
| PDF File 2189546.pdf | 432 kB | Shaun Ewing | Feb 06, 1940 00:00 |
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US-2189546-A // Transmission system // Edson James O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 432 kB | Shaun Ewing | Feb 06, 1940 00:00 | US-2189546-A // Transmission system // Edson James O. // Bell Telephone Labor Inc | ||||
| PDF File 2188940.pdf | 672 kB | Shaun Ewing | Feb 06, 1940 00:00 |
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US-2188940-A // Electron discharge device // Diggory Benjamin A. ; Teal Gordon K. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 672 kB | Shaun Ewing | Feb 06, 1940 00:00 | US-2188940-A // Electron discharge device // Diggory Benjamin A. ; Teal Gordon K. // Bell Telephone Labor Inc |
