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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| 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 2535872.pdf | 504 kB | Shaun Ewing | Dec 26, 1950 00:00 |
|
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 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 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 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 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 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 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 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 2569972.pdf | 276 kB | Shaun Ewing | Oct 02, 1951 00:00 |
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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 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 2584736.pdf | 2.36 MB | Shaun Ewing | Feb 05, 1952 00:00 |
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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 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 2614632.pdf | 864 kB | Shaun Ewing | Oct 21, 1952 00:00 |
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US-2614632-A // Apparatus for recording numerals in code // Clos Charles // American Telephone & Telegraph | |||
| Version 1 (current) | 864 kB | Shaun Ewing | Oct 21, 1952 00:00 | US-2614632-A // Apparatus for recording numerals in code // Clos Charles // American Telephone & Telegraph | ||||
| PDF File 2617888.pdf | 2.69 MB | Shaun Ewing | Nov 11, 1952 00:00 |
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US-2617888-A // Line lockout arrangement // Shepherd Judson O'D. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.69 MB | Shaun Ewing | Nov 11, 1952 00:00 | US-2617888-A // Line lockout arrangement // Shepherd Judson O'D. // American Telephone & Telegraph | ||||
| PDF File 2625608.pdf | 604 kB | Shaun Ewing | Jan 13, 1953 00:00 |
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US-2625608-A // Open telegraph line indicator // Hanley Frank Harold // American Telephone & Telegraph | |||
| Version 1 (current) | 604 kB | Shaun Ewing | Jan 13, 1953 00:00 | US-2625608-A // Open telegraph line indicator // Hanley Frank Harold // American Telephone & Telegraph | ||||
| PDF File 2625609.pdf | 347 kB | Shaun Ewing | Jan 13, 1953 00:00 |
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US-2625609-A // Telegraph repeater // Hanley Frank H. // American Telephone & Telegraph | |||
| Version 1 (current) | 347 kB | Shaun Ewing | Jan 13, 1953 00:00 | US-2625609-A // Telegraph repeater // Hanley Frank H. // American Telephone & Telegraph | ||||
| PDF File 2630493.pdf | 527 kB | Shaun Ewing | Mar 03, 1953 00:00 |
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US-2630493-A // Carrier telegraph system // Neiswinter James T. // American Telephone & Telegraph | |||
| Version 1 (current) | 527 kB | Shaun Ewing | Mar 03, 1953 00:00 | US-2630493-A // Carrier telegraph system // Neiswinter James T. // American Telephone & Telegraph | ||||
| PDF File 2630496.pdf | 683 kB | Shaun Ewing | Mar 03, 1953 00:00 |
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US-2630496-A // Two-way polar telegraph repeater // Harford George Philip // American Telephone & Telegraph | |||
| Version 1 (current) | 683 kB | Shaun Ewing | Mar 03, 1953 00:00 | US-2630496-A // Two-way polar telegraph repeater // Harford George Philip // American Telephone & Telegraph | ||||
| PDF File 2632054.pdf | 352 kB | Shaun Ewing | Mar 17, 1953 00:00 |
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US-2632054-A // Hub telegraph repeater // Hanley Frank Harold // American Telephone & Telegraph | |||
| Version 1 (current) | 352 kB | Shaun Ewing | Mar 17, 1953 00:00 | US-2632054-A // Hub telegraph repeater // Hanley Frank Harold // American Telephone & Telegraph |
