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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2588052.pdf | 12.82 MB | Shaun Ewing | Mar 04, 1952 00:00 |
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US-2588052-A // Control circuit for telephone systems // Shepherd Judson O'D. // American Telephone & Telegraph | |||
| Version 1 (current) | 12.82 MB | Shaun Ewing | Mar 04, 1952 00:00 | US-2588052-A // Control circuit for telephone systems // Shepherd Judson O'D. // American Telephone & Telegraph | ||||
| PDF File 2584736.pdf | 2.36 MB | Shaun Ewing | Feb 05, 1952 00:00 |
|
US-2584736-A // Telegraph switching system // Perry Donald B. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.36 MB | Shaun Ewing | Feb 05, 1952 00:00 | US-2584736-A // Telegraph switching system // Perry Donald B. // American Telephone & Telegraph | ||||
| PDF File 2569980.pdf | 839 kB | Shaun Ewing | Oct 02, 1951 00:00 |
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US-2569980-A // Motor control for signal responsive selector mechanism // Eggensperger Arlo Raleigh // American Telephone & Telegraph | |||
| Version 1 (current) | 839 kB | Shaun Ewing | Oct 02, 1951 00:00 | US-2569980-A // Motor control for signal responsive selector mechanism // Eggensperger Arlo Raleigh // American Telephone & Telegraph | ||||
| PDF File 2569972.pdf | 276 kB | Shaun Ewing | Oct 02, 1951 00:00 |
|
US-2569972-A // Two-wire test clip // Benner Archie Carol ; Guest Walter Leroy // American Telephone & Telegraph | |||
| Version 1 (current) | 276 kB | Shaun Ewing | Oct 02, 1951 00:00 | US-2569972-A // Two-wire test clip // Benner Archie Carol ; Guest Walter Leroy // American Telephone & Telegraph | ||||
| PDF File 2569926.pdf | 1.27 MB | Shaun Ewing | Oct 02, 1951 00:00 |
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US-2569926-A // Two-wire double commutation telegraph system // Fay Frank H. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.27 MB | Shaun Ewing | Oct 02, 1951 00:00 | US-2569926-A // Two-wire double commutation telegraph system // Fay Frank H. // American Telephone & Telegraph | ||||
| PDF File 2568019.pdf | 1.32 MB | Shaun Ewing | Sept 18, 1951 00:00 |
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US-2568019-A // Telegraph signal biasing set // Martin Wade B. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.32 MB | Shaun Ewing | Sept 18, 1951 00:00 | US-2568019-A // Telegraph signal biasing set // Martin Wade B. // American Telephone & Telegraph | ||||
| PDF File 2560709.pdf | 546 kB | Shaun Ewing | Jul 17, 1951 00:00 |
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US-2560709-A // Clipping amplifier // Woodward William Redin // American Telephone & Telegraph | |||
| Version 1 (current) | 546 kB | Shaun Ewing | Jul 17, 1951 00:00 | US-2560709-A // Clipping amplifier // Woodward William Redin // American Telephone & Telegraph | ||||
| PDF File 2553978.pdf | 1.61 MB | Shaun Ewing | May 22, 1951 00:00 |
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US-2553978-A // Electronic control telegraph repeater for hub circuit operation in telegraph service boards // Neiswinter James Trapp // American Telephone & Telegraph | |||
| Version 1 (current) | 1.61 MB | Shaun Ewing | May 22, 1951 00:00 | US-2553978-A // Electronic control telegraph repeater for hub circuit operation in telegraph service boards // Neiswinter James Trapp // American Telephone & Telegraph | ||||
| PDF File 2552704.pdf | 796 kB | Shaun Ewing | May 15, 1951 00:00 |
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US-2552704-A // Holder for books // Armstrong Frank C. ; Lauterbach Frederick J. ; Lillvik Walter ; Popper Julius S. // American Telephone & Telegraph | |||
| Version 1 (current) | 796 kB | Shaun Ewing | May 15, 1951 00:00 | US-2552704-A // Holder for books // Armstrong Frank C. ; Lauterbach Frederick J. ; Lillvik Walter ; Popper Julius S. // American Telephone & Telegraph | ||||
| PDF File 2547575.pdf | 479 kB | Shaun Ewing | Apr 03, 1951 00:00 |
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US-2547575-A // Telegraph repeater // Gilbo De Motte Whitcomb // American Telephone & Telegraph | |||
| Version 1 (current) | 479 kB | Shaun Ewing | Apr 03, 1951 00:00 | US-2547575-A // Telegraph repeater // Gilbo De Motte Whitcomb // American Telephone & Telegraph | ||||
| PDF File 2546334.pdf | 320 kB | Shaun Ewing | Mar 27, 1951 00:00 |
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US-2546334-A // Telephone substation having hearing aid facilities // Desnoes Arnold Bonaventure // American Telephone & Telegraph | |||
| Version 1 (current) | 320 kB | Shaun Ewing | Mar 27, 1951 00:00 | US-2546334-A // Telephone substation having hearing aid facilities // Desnoes Arnold Bonaventure // American Telephone & Telegraph | ||||
| PDF File 2535872.pdf | 504 kB | Shaun Ewing | Dec 26, 1950 00:00 |
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US-2535872-A // Signaling system // Shafer William Leroy // American Telephone & Telegraph | |||
| Version 1 (current) | 504 kB | Shaun Ewing | Dec 26, 1950 00:00 | US-2535872-A // Signaling system // Shafer William Leroy // American Telephone & Telegraph | ||||
| PDF File 2533342.pdf | 1014 kB | Shaun Ewing | Dec 12, 1950 00:00 |
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US-2533342-A // Tandem switching system // Avery Robert Campbell // American Telephone & Telegraph | |||
| Version 1 (current) | 1014 kB | Shaun Ewing | Dec 12, 1950 00:00 | US-2533342-A // Tandem switching system // Avery Robert Campbell // American Telephone & Telegraph | ||||
| PDF File 2528269.pdf | 1.64 MB | Shaun Ewing | Oct 31, 1950 00:00 |
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US-2528269-A // Selector switch control for automatic telephone systems // Bois Daniel King Du // American Telephone & Telegraph | |||
| Version 1 (current) | 1.64 MB | Shaun Ewing | Oct 31, 1950 00:00 | US-2528269-A // Selector switch control for automatic telephone systems // Bois Daniel King Du // American Telephone & Telegraph | ||||
| PDF File 2522003.pdf | 1.24 MB | Shaun Ewing | Sept 12, 1950 00:00 |
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US-2522003-A // Teletypewriter switching system // Walker Charles Robert // American Telephone & Telegraph | |||
| Version 1 (current) | 1.24 MB | Shaun Ewing | Sept 12, 1950 00:00 | US-2522003-A // Teletypewriter switching system // Walker Charles Robert // American Telephone & Telegraph | ||||
| PDF File 2522000.pdf | 14.04 MB | Shaun Ewing | Sept 12, 1950 00:00 |
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US-2522000-A // Recording telephone system // Shepherd Judson O'D // American Telephone & Telegraph | |||
| Version 1 (current) | 14.04 MB | Shaun Ewing | Sept 12, 1950 00:00 | US-2522000-A // Recording telephone system // Shepherd Judson O'D // American Telephone & Telegraph | ||||
| PDF File 2513400.pdf | 564 kB | Shaun Ewing | Jul 04, 1950 00:00 |
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US-2513400-A // Digit absorbing selector // Carson Arthur ; Cronk Earle Tabor // American Telephone & Telegraph | |||
| Version 1 (current) | 564 kB | Shaun Ewing | Jul 04, 1950 00:00 | US-2513400-A // Digit absorbing selector // Carson Arthur ; Cronk Earle Tabor // American Telephone & Telegraph | ||||
| PDF File 2509477.pdf | 481 kB | Shaun Ewing | May 30, 1950 00:00 |
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US-2509477-A // Coin control device for telephone coin collectors // Carson Arthur ; Gassman Kenneth Mackinzie // American Telephone & Telegraph | |||
| Version 1 (current) | 481 kB | Shaun Ewing | May 30, 1950 00:00 | US-2509477-A // Coin control device for telephone coin collectors // Carson Arthur ; Gassman Kenneth Mackinzie // American Telephone & Telegraph | ||||
| PDF File 2501883.pdf | 1.25 MB | Shaun Ewing | Mar 28, 1950 00:00 |
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US-2501883-A // Electronic frequency control for radio receivers // Weaver Charles Earl // American Telephone & Telegraph | |||
| Version 1 (current) | 1.25 MB | Shaun Ewing | Mar 28, 1950 00:00 | US-2501883-A // Electronic frequency control for radio receivers // Weaver Charles Earl // American Telephone & Telegraph | ||||
| PDF File 2497710.pdf | 206 kB | Shaun Ewing | Feb 14, 1950 00:00 |
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US-2497710-A // Gaff guard for linemen's climbers // Wollensack Clifford Nelson // American Telephone & Telegraph | |||
| Version 1 (current) | 206 kB | Shaun Ewing | Feb 14, 1950 00:00 | US-2497710-A // Gaff guard for linemen's climbers // Wollensack Clifford Nelson // American Telephone & Telegraph |
