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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| 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 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 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 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 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 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 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 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 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 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 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 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 1560540.pdf | 561 kB | Shaun Ewing | Nov 10, 1925 00:00 |
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US-1560540-A // Means for preventing electrical interference // Cory Samuel I. // American Telephone & Telegraph | |||
| Version 1 (current) | 561 kB | Shaun Ewing | Nov 10, 1925 00:00 | US-1560540-A // Means for preventing electrical interference // Cory Samuel I. // American Telephone & Telegraph | ||||
| PDF File 1560543.pdf | 674 kB | Shaun Ewing | Nov 10, 1925 00:00 |
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US-1560543-A // Testing circuits for echo suppressors // Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 674 kB | Shaun Ewing | Nov 10, 1925 00:00 | US-1560543-A // Testing circuits for echo suppressors // Crisson George // American Telephone & Telegraph | ||||
| PDF File 1560544.pdf | 424 kB | Shaun Ewing | Nov 10, 1925 00:00 |
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US-1560544-A // Testing circuits for echo suppressors // Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 424 kB | Shaun Ewing | Nov 10, 1925 00:00 | US-1560544-A // Testing circuits for echo suppressors // Crisson George // American Telephone & Telegraph | ||||
| PDF File 1560610.pdf | 793 kB | Shaun Ewing | Nov 10, 1925 00:00 |
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US-1560610-A // Supervisory circuits // Shoffstall Hugh F. // American Telephone And Telephg | |||
| Version 1 (current) | 793 kB | Shaun Ewing | Nov 10, 1925 00:00 | US-1560610-A // Supervisory circuits // Shoffstall Hugh F. // American Telephone And Telephg | ||||
| PDF File 1561345.pdf | 288 kB | Shaun Ewing | Nov 10, 1925 00:00 |
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US-1561345-A // Telephone attachment // Miller Volney T. // American Telephone Advertising | |||
| Version 1 (current) | 288 kB | Shaun Ewing | Nov 10, 1925 00:00 | US-1561345-A // Telephone attachment // Miller Volney T. // American Telephone Advertising | ||||
| PDF File 1561524.pdf | 431 kB | Shaun Ewing | Nov 17, 1925 00:00 |
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US-1561524-A // Telephone testing system // Jr. George Sandalls, // American Telephone & Telegraph | |||
| Version 1 (current) | 431 kB | Shaun Ewing | Nov 17, 1925 00:00 | US-1561524-A // Telephone testing system // Jr. George Sandalls, // American Telephone & Telegraph | ||||
| PDF File 1561526.pdf | 1.98 MB | Shaun Ewing | Nov 17, 1925 00:00 |
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US-1561526-A // Printing telegraphy // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.98 MB | Shaun Ewing | Nov 17, 1925 00:00 | US-1561526-A // Printing telegraphy // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 1561530.pdf | 261 kB | Shaun Ewing | Nov 17, 1925 00:00 |
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US-1561530-A // Telegraph repeater circuits // Conover Elmer J. // American Telephone & Telegraph | |||
| Version 1 (current) | 261 kB | Shaun Ewing | Nov 17, 1925 00:00 | US-1561530-A // Telegraph repeater circuits // Conover Elmer J. // American Telephone & Telegraph |
