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 1779495.pdf | 444 kB | Shaun Ewing | Oct 28, 1930 00:00 |
|
US-1779495-A // Substation rectification of carrier telegraph currents // Roberts Leland C. // American Telephone & Telegraph | |||
| Version 1 (current) | 444 kB | Shaun Ewing | Oct 28, 1930 00:00 | US-1779495-A // Substation rectification of carrier telegraph currents // Roberts Leland C. // American Telephone & Telegraph | ||||
| PDF File 1386977.pdf | 444 kB | Shaun Ewing | Aug 09, 1921 00:00 |
|
US-1386977-A // Indicating mechanism // Watson Edward F. // American Telephone & Telegraph | |||
| Version 1 (current) | 444 kB | Shaun Ewing | Aug 09, 1921 00:00 | US-1386977-A // Indicating mechanism // Watson Edward F. // American Telephone & Telegraph | ||||
| PDF File 1397975.pdf | 444 kB | Shaun Ewing | Nov 22, 1921 00:00 |
|
US-1397975-A // Electrical testing system // Kuhn George W. // American Telephone & Telegraph | |||
| Version 1 (current) | 444 kB | Shaun Ewing | Nov 22, 1921 00:00 | US-1397975-A // Electrical testing system // Kuhn George W. // American Telephone & Telegraph | ||||
| PDF File 1742252.pdf | 443 kB | Shaun Ewing | Jan 07, 1930 00:00 |
|
US-1742252-A // Piezo-electric frequency eliminator // Holden William H. T. // American Telephone & Telegraph | |||
| Version 1 (current) | 443 kB | Shaun Ewing | Jan 07, 1930 00:00 | US-1742252-A // Piezo-electric frequency eliminator // Holden William H. T. // American Telephone & Telegraph | ||||
| PDF File 1607837.pdf | 442 kB | Shaun Ewing | Nov 23, 1926 00:00 |
|
US-1607837-A // Radio repeater system // Martin De Loss K. // American Telephone & Telegraph | |||
| Version 1 (current) | 442 kB | Shaun Ewing | Nov 23, 1926 00:00 | US-1607837-A // Radio repeater system // Martin De Loss K. // American Telephone & Telegraph | ||||
| PDF File 1515660.pdf | 442 kB | Shaun Ewing | Nov 18, 1924 00:00 |
|
US-1515660-A // Measuring instrument for vacuum tubes // Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 442 kB | Shaun Ewing | Nov 18, 1924 00:00 | US-1515660-A // Measuring instrument for vacuum tubes // Crisson George // American Telephone & Telegraph | ||||
| PDF File 1624056.pdf | 442 kB | Shaun Ewing | Apr 12, 1927 00:00 |
|
US-1624056-A // Telephone substation circuits // Mckown Frederick W. ; Dietze Eginhard // American Telephone & Telegraph | |||
| Version 1 (current) | 442 kB | Shaun Ewing | Apr 12, 1927 00:00 | US-1624056-A // Telephone substation circuits // Mckown Frederick W. ; Dietze Eginhard // American Telephone & Telegraph | ||||
| PDF File 1619058.pdf | 441 kB | Shaun Ewing | Mar 01, 1927 00:00 |
|
US-1619058-A // Telephone repeater station // Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 441 kB | Shaun Ewing | Mar 01, 1927 00:00 | US-1619058-A // Telephone repeater station // Crisson George // American Telephone & Telegraph | ||||
| PDF File 1370558.pdf | 441 kB | Shaun Ewing | Mar 08, 1921 00:00 |
|
US-1370558-A // Machine ringing system // Rhodes William A. // American Telephone & Telegraph | |||
| Version 1 (current) | 441 kB | Shaun Ewing | Mar 08, 1921 00:00 | US-1370558-A // Machine ringing system // Rhodes William A. // American Telephone & Telegraph | ||||
| PDF File 1746314.pdf | 440 kB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746314-A // Loading system for long submarine cables // Lewis Benjamin F. // American Telephone & Telegraph | |||
| Version 1 (current) | 440 kB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746314-A // Loading system for long submarine cables // Lewis Benjamin F. // 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 1451746.pdf | 439 kB | Shaun Ewing | Apr 17, 1923 00:00 |
|
US-1451746-A // Multiplex selecting circuits // Sultzer Morton // American Telephone & Telegraph | |||
| Version 1 (current) | 439 kB | Shaun Ewing | Apr 17, 1923 00:00 | US-1451746-A // Multiplex selecting circuits // Sultzer Morton // American Telephone & Telegraph | ||||
| PDF File 1508424.pdf | 439 kB | Shaun Ewing | Sept 16, 1924 00:00 |
|
US-1508424-A // Telephone desk set // Thompson George K. // American Telephone & Telegraph | |||
| Version 1 (current) | 439 kB | Shaun Ewing | Sept 16, 1924 00:00 | US-1508424-A // Telephone desk set // Thompson George K. // American Telephone & Telegraph | ||||
| PDF File 1395007.pdf | 438 kB | Shaun Ewing | Oct 25, 1921 00:00 |
|
US-1395007-A // Telegraph system // Post Arthur W. // American Telephone & Telegraph | |||
| Version 1 (current) | 438 kB | Shaun Ewing | Oct 25, 1921 00:00 | US-1395007-A // Telegraph system // Post Arthur W. // American Telephone & Telegraph | ||||
| PDF File 1543775.pdf | 438 kB | Shaun Ewing | Jun 30, 1925 00:00 |
|
US-1543775-A // Apparatus for neutralizing radiointerference on wire lines // Ilgenfritz Lester M. // American Telephone & Telegraph | |||
| Version 1 (current) | 438 kB | Shaun Ewing | Jun 30, 1925 00:00 | US-1543775-A // Apparatus for neutralizing radiointerference on wire lines // Ilgenfritz Lester M. // American Telephone & Telegraph | ||||
| PDF File 1436683.pdf | 438 kB | Shaun Ewing | Nov 28, 1922 00:00 |
|
US-1436683-A // Battery supply circuits for repeaters // Rose Arthur F. // American Telephone ; Telegraph Company | |||
| Version 1 (current) | 438 kB | Shaun Ewing | Nov 28, 1922 00:00 | US-1436683-A // Battery supply circuits for repeaters // Rose Arthur F. // American Telephone ; Telegraph Company | ||||
| PDF File 1753444.pdf | 437 kB | Shaun Ewing | Apr 08, 1930 00:00 |
|
US-1753444-A // Signaling system // Ohl Russell S. // American Telephone & Telegraph | |||
| Version 1 (current) | 437 kB | Shaun Ewing | Apr 08, 1930 00:00 | US-1753444-A // Signaling system // Ohl Russell S. // American Telephone & Telegraph | ||||
| PDF File 1582112.pdf | 437 kB | Shaun Ewing | Apr 27, 1926 00:00 |
|
US-1582112-A // Phantom carrier circuits // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 437 kB | Shaun Ewing | Apr 27, 1926 00:00 | US-1582112-A // Phantom carrier circuits // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1681216.pdf | 436 kB | Shaun Ewing | Aug 21, 1928 00:00 |
|
US-1681216-A // Composite set // Branson David E. ; Shanck Roy B. // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Aug 21, 1928 00:00 | US-1681216-A // Composite set // Branson David E. ; Shanck Roy B. // American Telephone & Telegraph | ||||
| PDF File 1741363.pdf | 436 kB | Shaun Ewing | Dec 31, 1929 00:00 |
|
US-1741363-A // Piezo-electric interference eliminator // Green Estill I. // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Dec 31, 1929 00:00 | US-1741363-A // Piezo-electric interference eliminator // Green Estill I. // American Telephone & Telegraph |
