Unable to load page tree. It seems that you do not have permission to view the root page.
Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1555001.pdf | 1.47 MB | Shaun Ewing | Sept 29, 1925 00:00 |
|
US-1555001-A // Telephone signaling system // Gray Ernest A. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.47 MB | Shaun Ewing | Sept 29, 1925 00:00 | US-1555001-A // Telephone signaling system // Gray Ernest A. // American Telephone & Telegraph | ||||
| PDF File 1555002.pdf | 1.24 MB | Shaun Ewing | Sept 29, 1925 00:00 |
|
US-1555002-A // Telephone-exchange system // Gray Ernest A. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.24 MB | Shaun Ewing | Sept 29, 1925 00:00 | US-1555002-A // Telephone-exchange system // Gray Ernest A. // American Telephone & Telegraph | ||||
| PDF File 1555037.pdf | 268 kB | Shaun Ewing | Sept 29, 1925 00:00 |
|
US-1555037-A // Resistance amplifier // Stone John Stone // American Telephone & Telegraph | |||
| Version 1 (current) | 268 kB | Shaun Ewing | Sept 29, 1925 00:00 | US-1555037-A // Resistance amplifier // Stone John Stone // American Telephone & Telegraph | ||||
| PDF File 1555041.pdf | 824 kB | Shaun Ewing | Sept 29, 1925 00:00 |
|
US-1555041-A // Distortion-measuring system // Vernam Gilbert S. ; Perry Donald B. ; Cory Samuel I. // American Telephone & Telegraph | |||
| Version 1 (current) | 824 kB | Shaun Ewing | Sept 29, 1925 00:00 | US-1555041-A // Distortion-measuring system // Vernam Gilbert S. ; Perry Donald B. ; Cory Samuel I. // American Telephone & Telegraph | ||||
| PDF File 1555870.pdf | 315 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1555870-A // Telegraph repeater // Nyquist Harry // American Telephone & Telegraph | |||
| Version 1 (current) | 315 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1555870-A // Telegraph repeater // Nyquist Harry // American Telephone & Telegraph | ||||
| PDF File 1555875.pdf | 310 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1555875-A // Telegraph measuring system // Pierce Ralph E. // American Telephone & Telegraph | |||
| Version 1 (current) | 310 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1555875-A // Telegraph measuring system // Pierce Ralph E. // American Telephone & Telegraph | ||||
| PDF File 1555893.pdf | 269 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1555893-A // Alternating-current relay // Thompson Elmer O. // American Telephone & Telegraph | |||
| Version 1 (current) | 269 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1555893-A // Alternating-current relay // Thompson Elmer O. // American Telephone & Telegraph | ||||
| PDF File 1555916.pdf | 657 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1555916-A // Frequency-translating system // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 657 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1555916-A // Frequency-translating system // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1555917.pdf | 316 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1555917-A // Telegraphy // Fell John M. // American Telephone & Telegraph | |||
| Version 1 (current) | 316 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1555917-A // Telegraphy // Fell John M. // American Telephone & Telegraph | ||||
| PDF File 1556311.pdf | 440 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1556311-A // Signaling system // Jr. John Davidson, // American Telephone & Telegraph | |||
| Version 1 (current) | 440 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1556311-A // Signaling system // Jr. John Davidson, // American Telephone & Telegraph | ||||
| PDF File 1556318.pdf | 691 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1556318-A // High-frequency multiplex signaling system // Espenschied Lloyd ; Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 691 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1556318-A // High-frequency multiplex signaling system // Espenschied Lloyd ; Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1556319.pdf | 851 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
US-1556319-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 851 kB | Shaun Ewing | Oct 06, 1925 00:00 | US-1556319-A // High-frequency multiplex signaling system // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1556320.pdf | 534 kB | Shaun Ewing | Oct 06, 1925 00:00 |
|
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 | ||||
| PDF File 1557037.pdf | 1.08 MB | Shaun Ewing | Oct 13, 1925 00:00 |
|
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 1557079.pdf | 910 kB | Shaun Ewing | Oct 13, 1925 00:00 |
|
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 1557229.pdf | 818 kB | Shaun Ewing | Oct 13, 1925 00:00 |
|
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 1557230.pdf | 988 kB | Shaun Ewing | Oct 13, 1925 00:00 |
|
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 1557544.pdf | 1.13 MB | Shaun Ewing | Oct 20, 1925 00:00 |
|
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 1557562.pdf | 371 kB | Shaun Ewing | Oct 20, 1925 00:00 |
|
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 1557596.pdf | 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 | |||
| 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 |
