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 1569898.pdf | 510 kB | Shaun Ewing | Jan 19, 1926 00:00 |
|
US-1569898-A // Signaling system // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 510 kB | Shaun Ewing | Jan 19, 1926 00:00 | US-1569898-A // Signaling system // Toomey John F. // American Telephone & Telegraph | ||||
| PDF File 1712542.pdf | 509 kB | Shaun Ewing | May 14, 1929 00:00 |
|
US-1712542-A // Toll trunk circuit // Bailey Rand S. // American Telephone & Telegraph | |||
| Version 1 (current) | 509 kB | Shaun Ewing | May 14, 1929 00:00 | US-1712542-A // Toll trunk circuit // Bailey Rand S. // American Telephone & Telegraph | ||||
| PDF File 1480612.pdf | 508 kB | Shaun Ewing | Jan 15, 1924 00:00 |
|
US-1480612-A // Multiplex signaling system // Hitchcock Harry W. // American Telephone & Telegraph | |||
| Version 1 (current) | 508 kB | Shaun Ewing | Jan 15, 1924 00:00 | US-1480612-A // Multiplex signaling system // Hitchcock Harry W. // American Telephone & Telegraph | ||||
| PDF File 1547227.pdf | 508 kB | Shaun Ewing | Jul 28, 1925 00:00 |
|
US-1547227-A // Telegraph signaling system // Mitchiner James I. // American Telephone & Telegraph | |||
| Version 1 (current) | 508 kB | Shaun Ewing | Jul 28, 1925 00:00 | US-1547227-A // Telegraph signaling system // Mitchiner James I. // American Telephone & Telegraph | ||||
| PDF File 1580192.pdf | 508 kB | Shaun Ewing | Apr 13, 1926 00:00 |
|
US-1580192-A // Duplex telegraph system // Fell John M. // American Telephone & Telegraph | |||
| Version 1 (current) | 508 kB | Shaun Ewing | Apr 13, 1926 00:00 | US-1580192-A // Duplex telegraph system // Fell John M. // American Telephone & Telegraph | ||||
| PDF File 1537986.pdf | 507 kB | Shaun Ewing | May 19, 1925 00:00 |
|
US-1537986-A // Telephone repeater equipment // Crisson George ; Shackleton Samuel P. // American Telephone & Telegraph | |||
| Version 1 (current) | 507 kB | Shaun Ewing | May 19, 1925 00:00 | US-1537986-A // Telephone repeater equipment // Crisson George ; Shackleton Samuel P. // American Telephone & Telegraph | ||||
| PDF File 1705561.pdf | 506 kB | Shaun Ewing | Mar 19, 1929 00:00 |
|
US-1705561-A // Electrical testing system // Edwards Paul G. ; Herrington Harold W. // American Telephone & Telegraph | |||
| Version 1 (current) | 506 kB | Shaun Ewing | Mar 19, 1929 00:00 | US-1705561-A // Electrical testing system // Edwards Paul G. ; Herrington Harold W. // American Telephone & Telegraph | ||||
| PDF File 1369805.pdf | 505 kB | Shaun Ewing | Mar 01, 1921 00:00 |
|
US-1369805-A // Secret-communication system // Hamilton Baxter P. // American Telephone & Telegraph | |||
| Version 1 (current) | 505 kB | Shaun Ewing | Mar 01, 1921 00:00 | US-1369805-A // Secret-communication system // Hamilton Baxter P. // American Telephone & Telegraph | ||||
| PDF File 1735943.pdf | 504 kB | Shaun Ewing | Nov 19, 1929 00:00 |
|
US-1735943-A // Method of and means for testing telegraph transmission // Watson Edward Fisk ; Swezey Burdette Stevens // American Telephone & Telegraph | |||
| Version 1 (current) | 504 kB | Shaun Ewing | Nov 19, 1929 00:00 | US-1735943-A // Method of and means for testing telegraph transmission // Watson Edward Fisk ; Swezey Burdette Stevens // American Telephone & Telegraph | ||||
| PDF File 1783130.pdf | 504 kB | Shaun Ewing | Nov 25, 1930 00:00 |
|
US-1783130-A // Piezo-electric oscillator // Ohl Russell S. // American Telephone & Telegraph | |||
| Version 1 (current) | 504 kB | Shaun Ewing | Nov 25, 1930 00:00 | US-1783130-A // Piezo-electric oscillator // Ohl Russell S. // American Telephone & Telegraph | ||||
| PDF File 1731243.pdf | 503 kB | Shaun Ewing | Oct 15, 1929 00:00 |
|
US-1731243-A // Signaling system // Ehrlich Jefferson // American Telephone & Telegraph | |||
| Version 1 (current) | 503 kB | Shaun Ewing | Oct 15, 1929 00:00 | US-1731243-A // Signaling system // Ehrlich Jefferson // American Telephone & Telegraph | ||||
| PDF File 1699570.pdf | 502 kB | Shaun Ewing | Jan 22, 1929 00:00 |
|
US-1699570-A // Carrier suppression modulation // Potter Ralph K. // American Telephone & Telegraph | |||
| Version 1 (current) | 502 kB | Shaun Ewing | Jan 22, 1929 00:00 | US-1699570-A // Carrier suppression modulation // Potter Ralph K. // American Telephone & Telegraph | ||||
| PDF File 1631174.pdf | 501 kB | Shaun Ewing | Jun 07, 1927 00:00 |
|
US-1631174-A // Telegraph signaling system // Wilburn Sidney D. // American Telephone & Telegraph | |||
| Version 1 (current) | 501 kB | Shaun Ewing | Jun 07, 1927 00:00 | US-1631174-A // Telegraph signaling system // Wilburn Sidney D. // American Telephone & Telegraph | ||||
| PDF File 1450254.pdf | 501 kB | Shaun Ewing | Apr 03, 1923 00:00 |
|
US-1450254-A // Balancing arrangement for multiplex carrier circuits // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 501 kB | Shaun Ewing | Apr 03, 1923 00:00 | US-1450254-A // Balancing arrangement for multiplex carrier circuits // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1744836.pdf | 499 kB | Shaun Ewing | Jan 28, 1930 00:00 |
|
US-1744836-A // Carrier-amplitude control in radio systems // Ohl Russell S. // American Telephone & Telegraph | |||
| Version 1 (current) | 499 kB | Shaun Ewing | Jan 28, 1930 00:00 | US-1744836-A // Carrier-amplitude control in radio systems // Ohl Russell S. // American Telephone & Telegraph | ||||
| PDF File 1365734.pdf | 498 kB | Shaun Ewing | Jan 18, 1921 00:00 |
|
US-1365734-A // Electron-tube-testing circuits // Shackleton Samuel P. // American Telephone & Telegraph | |||
| Version 1 (current) | 498 kB | Shaun Ewing | Jan 18, 1921 00:00 | US-1365734-A // Electron-tube-testing circuits // Shackleton Samuel P. // American Telephone & Telegraph | ||||
| PDF File 1679412.pdf | 498 kB | Shaun Ewing | Aug 07, 1928 00:00 |
|
US-1679412-A // Unloading device for conveying systems // Potter Edward F. De // American Telephone & Telegraph | |||
| Version 1 (current) | 498 kB | Shaun Ewing | Aug 07, 1928 00:00 | US-1679412-A // Unloading device for conveying systems // Potter Edward F. De // American Telephone & Telegraph | ||||
| PDF File 1547226.pdf | 498 kB | Shaun Ewing | Jul 28, 1925 00:00 |
|
US-1547226-A // Signaling // Martin William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 498 kB | Shaun Ewing | Jul 28, 1925 00:00 | US-1547226-A // Signaling // Martin William H. // American Telephone & Telegraph | ||||
| PDF File 1646438.pdf | 497 kB | Shaun Ewing | Oct 25, 1927 00:00 |
|
US-1646438-A // Harmonic generator // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 497 kB | Shaun Ewing | Oct 25, 1927 00:00 | US-1646438-A // Harmonic generator // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1582073.pdf | 497 kB | Shaun Ewing | Apr 27, 1926 00:00 |
|
US-1582073-A // Phantom carrier circuits // O'Leary Joseph T. // American Telephone & Telegraph | |||
| Version 1 (current) | 497 kB | Shaun Ewing | Apr 27, 1926 00:00 | US-1582073-A // Phantom carrier circuits // O'Leary Joseph T. // American Telephone & Telegraph |
