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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1689230.pdf | 248 kB | Shaun Ewing | Oct 30, 1928 00:00 |
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US-1689230-A // Locking device for switch keys // Christopher Harry J. // American Telephone & Telegraph | |||
| Version 1 (current) | 248 kB | Shaun Ewing | Oct 30, 1928 00:00 | US-1689230-A // Locking device for switch keys // Christopher Harry J. // American Telephone & Telegraph | ||||
| PDF File 1689263.pdf | 1.25 MB | Shaun Ewing | Oct 30, 1928 00:00 |
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US-1689263-A // Printing telegraphy // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.25 MB | Shaun Ewing | Oct 30, 1928 00:00 | US-1689263-A // Printing telegraphy // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 1689267.pdf | 326 kB | Shaun Ewing | Oct 30, 1928 00:00 |
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US-1689267-A // Method and apparatus for picture transmission // Weaver Allan // American Telephone & Telegraph | |||
| Version 1 (current) | 326 kB | Shaun Ewing | Oct 30, 1928 00:00 | US-1689267-A // Method and apparatus for picture transmission // Weaver Allan // American Telephone & Telegraph | ||||
| PDF File 1690153.pdf | 314 kB | Shaun Ewing | Nov 06, 1928 00:00 |
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US-1690153-A // Selective echo suppressor // Abraham Leonard G. // American Telephone & Telegraph | |||
| Version 1 (current) | 314 kB | Shaun Ewing | Nov 06, 1928 00:00 | US-1690153-A // Selective echo suppressor // Abraham Leonard G. // American Telephone & Telegraph | ||||
| PDF File 1690167.pdf | 316 kB | Shaun Ewing | Nov 06, 1928 00:00 |
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US-1690167-A // Vacuum tube and associated element // Holden William H. T. // American Telephone & Telegraph | |||
| Version 1 (current) | 316 kB | Shaun Ewing | Nov 06, 1928 00:00 | US-1690167-A // Vacuum tube and associated element // Holden William H. T. // American Telephone & Telegraph | ||||
| PDF File 1690182.pdf | 716 kB | Shaun Ewing | Nov 06, 1928 00:00 |
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US-1690182-A // Suppression of echoes and singing in four-wire circuits // Silent Harold C. // American Telephone & Telegraph | |||
| Version 1 (current) | 716 kB | Shaun Ewing | Nov 06, 1928 00:00 | US-1690182-A // Suppression of echoes and singing in four-wire circuits // Silent Harold C. // American Telephone & Telegraph | ||||
| PDF File 1691091.pdf | 352 kB | Shaun Ewing | Nov 13, 1928 00:00 |
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US-1691091-A // Alternating-current relay // Thompson Elmer O. // American Telephone & Telegraph | |||
| Version 1 (current) | 352 kB | Shaun Ewing | Nov 13, 1928 00:00 | US-1691091-A // Alternating-current relay // Thompson Elmer O. // American Telephone & Telegraph | ||||
| PDF File 1691150.pdf | 227 kB | Shaun Ewing | Nov 13, 1928 00:00 |
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US-1691150-A // Electrical power-limiting device // Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 227 kB | Shaun Ewing | Nov 13, 1928 00:00 | US-1691150-A // Electrical power-limiting device // Crisson George // American Telephone & Telegraph | ||||
| PDF File 1691962.pdf | 325 kB | Shaun Ewing | Nov 20, 1928 00:00 |
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US-1691962-A // Selective signaling system // Demarest Charles S. // American Telephone & Telegraph | |||
| Version 1 (current) | 325 kB | Shaun Ewing | Nov 20, 1928 00:00 | US-1691962-A // Selective signaling system // Demarest Charles S. // American Telephone & Telegraph | ||||
| PDF File 1691986.pdf | 554 kB | Shaun Ewing | Nov 20, 1928 00:00 |
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US-1691986-A // Apparatus and method for generating pure sine waves of electromotive force // Nyquist Harry // American Telephone & Telegraph | |||
| Version 1 (current) | 554 kB | Shaun Ewing | Nov 20, 1928 00:00 | US-1691986-A // Apparatus and method for generating pure sine waves of electromotive force // Nyquist Harry // American Telephone & Telegraph | ||||
| PDF File 1691990.pdf | 419 kB | Shaun Ewing | Nov 20, 1928 00:00 |
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US-1691990-A // High-frequency signaling system // Potter Ralph K. // American Telephone & Telegraph | |||
| Version 1 (current) | 419 kB | Shaun Ewing | Nov 20, 1928 00:00 | US-1691990-A // High-frequency signaling system // Potter Ralph K. // American Telephone & Telegraph | ||||
| PDF File 1692317.pdf | 943 kB | Shaun Ewing | Nov 20, 1928 00:00 |
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US-1692317-A // Acoustic wave filter // Stewart George Walter // American Telephone & Telegraph | |||
| Version 1 (current) | 943 kB | Shaun Ewing | Nov 20, 1928 00:00 | US-1692317-A // Acoustic wave filter // Stewart George Walter // American Telephone & Telegraph | ||||
| PDF File 1692904.pdf | 267 kB | Shaun Ewing | Nov 27, 1928 00:00 |
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US-1692904-A // Amplification of photo-electric call response // Potter Ralph K. // American Telephone & Telegraph | |||
| Version 1 (current) | 267 kB | Shaun Ewing | Nov 27, 1928 00:00 | US-1692904-A // Amplification of photo-electric call response // Potter Ralph K. // American Telephone & Telegraph | ||||
| PDF File 1692907.pdf | 282 kB | Shaun Ewing | Nov 27, 1928 00:00 |
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US-1692907-A // Relaying arrangement // Shackleton Samuel P. ; Hansen Arnold A. // American Telephone & Telegraph | |||
| Version 1 (current) | 282 kB | Shaun Ewing | Nov 27, 1928 00:00 | US-1692907-A // Relaying arrangement // Shackleton Samuel P. ; Hansen Arnold A. // American Telephone & Telegraph | ||||
| PDF File 1692961.pdf | 230 kB | Shaun Ewing | Nov 27, 1928 00:00 |
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US-1692961-A // Alternating-current relay // Thompson Elmer O. // American Telephone & Telegraph | |||
| Version 1 (current) | 230 kB | Shaun Ewing | Nov 27, 1928 00:00 | US-1692961-A // Alternating-current relay // Thompson Elmer O. // American Telephone & Telegraph | ||||
| PDF File 1693653.pdf | 136 kB | Shaun Ewing | Dec 04, 1928 00:00 |
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US-1693653-A // Battery supply circuit // Mckown Frederick W. // American Telephone & Telegraph | |||
| Version 1 (current) | 136 kB | Shaun Ewing | Dec 04, 1928 00:00 | US-1693653-A // Battery supply circuit // Mckown Frederick W. // American Telephone & Telegraph | ||||
| PDF File 1693659.pdf | 520 kB | Shaun Ewing | Dec 04, 1928 00:00 |
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US-1693659-A // Echo suppressor // Nyquist Harry ; Pfleger Kenneth W. // American Telephone & Telegraph | |||
| Version 1 (current) | 520 kB | Shaun Ewing | Dec 04, 1928 00:00 | US-1693659-A // Echo suppressor // Nyquist Harry ; Pfleger Kenneth W. // American Telephone & Telegraph | ||||
| PDF File 1693662.pdf | 447 kB | Shaun Ewing | Dec 04, 1928 00:00 |
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US-1693662-A // Radio signaling system // Ohl Russell S. // American Telephone & Telegraph | |||
| Version 1 (current) | 447 kB | Shaun Ewing | Dec 04, 1928 00:00 | US-1693662-A // Radio signaling system // Ohl Russell S. // American Telephone & Telegraph | ||||
| PDF File 1693685.pdf | 206 kB | Shaun Ewing | Dec 04, 1928 00:00 |
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US-1693685-A // Method and apparatus for transmission of pictures // Weaver Allan // American Telephone & Telegraph | |||
| Version 1 (current) | 206 kB | Shaun Ewing | Dec 04, 1928 00:00 | US-1693685-A // Method and apparatus for transmission of pictures // Weaver Allan // American Telephone & Telegraph | ||||
| PDF File 1694406.pdf | 895 kB | Shaun Ewing | Dec 11, 1928 00:00 |
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US-1694406-A // Telephone-exchange system // Bascom Henry M. ; Jacobsen Emil // American Telephone & Telegraph | |||
| Version 1 (current) | 895 kB | Shaun Ewing | Dec 11, 1928 00:00 | US-1694406-A // Telephone-exchange system // Bascom Henry M. ; Jacobsen Emil // American Telephone & Telegraph |
