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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1560531.pdf | 218 kB | Shaun Ewing | Nov 10, 1925 00:00 |
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US-1560531-A // Automatic switch // Blauvelt William G. // American Telephone & Telegraph | |||
| Version 1 (current) | 218 kB | Shaun Ewing | Nov 10, 1925 00:00 | US-1560531-A // Automatic switch // Blauvelt William G. // American Telephone & Telegraph | ||||
| PDF File 1559659.pdf | 329 kB | Shaun Ewing | Nov 03, 1925 00:00 |
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US-1559659-A // Service-observing equipment for automatic telephone systems // Walters James N. // American Telephone & Telegraph | |||
| Version 1 (current) | 329 kB | Shaun Ewing | Nov 03, 1925 00:00 | US-1559659-A // Service-observing equipment for automatic telephone systems // Walters James N. // American Telephone & Telegraph | ||||
| PDF File 1559656.pdf | 251 kB | Shaun Ewing | Nov 03, 1925 00:00 |
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US-1559656-A // Method of and means for increasing voltages // Thorp I. Jay // American Telephone & Telegraph | |||
| Version 1 (current) | 251 kB | Shaun Ewing | Nov 03, 1925 00:00 | US-1559656-A // Method of and means for increasing voltages // Thorp I. Jay // American Telephone & Telegraph | ||||
| PDF File 1559642.pdf | 980 kB | Shaun Ewing | Nov 03, 1925 00:00 |
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US-1559642-A // Signaling with phase reversals // Nyquist Harry // American Telephone & Telegraph | |||
| Version 1 (current) | 980 kB | Shaun Ewing | Nov 03, 1925 00:00 | US-1559642-A // Signaling with phase reversals // Nyquist Harry // American Telephone & Telegraph | ||||
| PDF File 1559641.pdf | 989 kB | Shaun Ewing | Nov 03, 1925 00:00 |
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US-1559641-A // Signaling with phase reversals // Nyquist Harry // American Telephone & Telegraph | |||
| Version 1 (current) | 989 kB | Shaun Ewing | Nov 03, 1925 00:00 | US-1559641-A // Signaling with phase reversals // Nyquist Harry // American Telephone & Telegraph | ||||
| PDF File 1559638.pdf | 478 kB | Shaun Ewing | Nov 03, 1925 00:00 |
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US-1559638-A // Wave filter // Martin William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 478 kB | Shaun Ewing | Nov 03, 1925 00:00 | US-1559638-A // Wave filter // Martin William H. // American Telephone & Telegraph | ||||
| PDF File 1559159.pdf | 610 kB | Shaun Ewing | Oct 27, 1925 00:00 |
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US-1559159-A // Telegraph signaling system // Carson John R. // American Telephone & Telegraph | |||
| Version 1 (current) | 610 kB | Shaun Ewing | Oct 27, 1925 00:00 | US-1559159-A // Telegraph signaling system // Carson John R. // American Telephone & Telegraph | ||||
| PDF File 1558564.pdf | 364 kB | Shaun Ewing | Oct 27, 1925 00:00 |
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US-1558564-A // Electrical testing system // Nyquist Harry // American Telephone & Telegraph | |||
| Version 1 (current) | 364 kB | Shaun Ewing | Oct 27, 1925 00:00 | US-1558564-A // Electrical testing system // Nyquist Harry // American Telephone & Telegraph | ||||
| PDF File 1558534.pdf | 300 kB | Shaun Ewing | Oct 27, 1925 00:00 |
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US-1558534-A // Telephone circuits // Jr. John Davidson, // American Telephone & Telegraph | |||
| Version 1 (current) | 300 kB | Shaun Ewing | Oct 27, 1925 00:00 | US-1558534-A // Telephone circuits // Jr. John Davidson, // American Telephone & Telegraph | ||||
| PDF File 1558521.pdf | 382 kB | Shaun Ewing | Oct 27, 1925 00:00 |
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US-1558521-A // Telephone-exchange system // Nostitz Erich Von // American Telephone & Telegraph | |||
| Version 1 (current) | 382 kB | Shaun Ewing | Oct 27, 1925 00:00 | US-1558521-A // Telephone-exchange system // Nostitz Erich Von // American Telephone & Telegraph | ||||
| PDF File 1558280.pdf | 732 kB | Shaun Ewing | Oct 20, 1925 00:00 |
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US-1558280-A // Secret system of telegraphy // Potts Louis M. // American Telephone & Telegraph | |||
| Version 1 (current) | 732 kB | Shaun Ewing | Oct 20, 1925 00:00 | US-1558280-A // Secret system of telegraphy // Potts Louis M. // American Telephone & Telegraph | ||||
| PDF File 1557633.pdf | 993 kB | Shaun Ewing | Oct 20, 1925 00:00 |
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US-1557633-A // Translating device // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 993 kB | Shaun Ewing | Oct 20, 1925 00:00 | US-1557633-A // Translating device // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 1557596.pdf | 702 kB | Shaun Ewing | Oct 20, 1925 00:00 |
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US-1557596-A // Machine-switching telephone exchange system // Lamb Willis E. ; Mason Ralph W. // American Telephone & Telegraph | |||
| Version 1 (current) | 702 kB | Shaun Ewing | Oct 20, 1925 00:00 | US-1557596-A // Machine-switching telephone exchange system // Lamb Willis E. ; Mason Ralph W. // American Telephone & Telegraph | ||||
| PDF File 1557562.pdf | 371 kB | Shaun Ewing | Oct 20, 1925 00:00 |
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US-1557562-A // Frequency selective device // Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 371 kB | Shaun Ewing | Oct 20, 1925 00:00 | US-1557562-A // Frequency selective device // Crisson George // American Telephone & Telegraph | ||||
| PDF File 1557544.pdf | 1.13 MB | Shaun Ewing | Oct 20, 1925 00:00 |
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US-1557544-A // Carrier frequency arrangement // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.13 MB | Shaun Ewing | Oct 20, 1925 00:00 | US-1557544-A // Carrier frequency arrangement // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1557230.pdf | 988 kB | Shaun Ewing | Oct 13, 1925 00:00 |
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US-1557230-A // Complementary filter // Zobel Otto J. // American Telephone & Telegraph | |||
| Version 1 (current) | 988 kB | Shaun Ewing | Oct 13, 1925 00:00 | US-1557230-A // Complementary filter // Zobel Otto J. // American Telephone & Telegraph | ||||
| PDF File 1557229.pdf | 818 kB | Shaun Ewing | Oct 13, 1925 00:00 |
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US-1557229-A // Terminating network for filters // Zobel Otto J. // American Telephone & Telegraph | |||
| Version 1 (current) | 818 kB | Shaun Ewing | Oct 13, 1925 00:00 | US-1557229-A // Terminating network for filters // Zobel Otto J. // American Telephone & Telegraph | ||||
| PDF File 1557079.pdf | 910 kB | Shaun Ewing | Oct 13, 1925 00:00 |
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US-1557079-A // Telephone signaling equipment // Morehouse Lyman F. // American Telephone & Telegraph | |||
| Version 1 (current) | 910 kB | Shaun Ewing | Oct 13, 1925 00:00 | US-1557079-A // Telephone signaling equipment // Morehouse Lyman F. // American Telephone & Telegraph | ||||
| PDF File 1557037.pdf | 1.08 MB | Shaun Ewing | Oct 13, 1925 00:00 |
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US-1557037-A // Reduction of cross talk // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 1.08 MB | Shaun Ewing | Oct 13, 1925 00:00 | US-1557037-A // Reduction of cross talk // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1556320.pdf | 534 kB | Shaun Ewing | Oct 06, 1925 00:00 |
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US-1556320-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 534 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1556320-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph |
