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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| 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 1369403.pdf | 780 kB | Shaun Ewing | Feb 22, 1921 00:00 |
|
US-1369403-A // Testing apparatus // Demarest Charles S. ; Shoffstall Hugh F. // American Telephone & Telegraph | |||
| Version 1 (current) | 780 kB | Shaun Ewing | Feb 22, 1921 00:00 | US-1369403-A // Testing apparatus // Demarest Charles S. ; Shoffstall Hugh F. // American Telephone & Telegraph | ||||
| PDF File 1369003.pdf | 1.21 MB | Shaun Ewing | Feb 22, 1921 00:00 |
|
US-1369003-A // Semimechanical switchboard // Blauvelt William G. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.21 MB | Shaun Ewing | Feb 22, 1921 00:00 | US-1369003-A // Semimechanical switchboard // Blauvelt William G. // American Telephone & Telegraph | ||||
| PDF File 1368296.pdf | 247 kB | Shaun Ewing | Feb 15, 1921 00:00 |
|
US-1368296-A // Anchoring device // Sked Norman S. // American Telephone & Telegraph | |||
| Version 1 (current) | 247 kB | Shaun Ewing | Feb 15, 1921 00:00 | US-1368296-A // Anchoring device // Sked Norman S. // American Telephone & Telegraph | ||||
| PDF File 1368288.pdf | 522 kB | Shaun Ewing | Feb 15, 1921 00:00 |
|
US-1368288-A // Electromagnetic device // Pierce Ralph E. // American Telephone ; Telegraph Company | |||
| Version 1 (current) | 522 kB | Shaun Ewing | Feb 15, 1921 00:00 | US-1368288-A // Electromagnetic device // Pierce Ralph E. // American Telephone ; Telegraph Company | ||||
| PDF File 1367571.pdf | 415 kB | Shaun Ewing | Feb 08, 1921 00:00 |
|
US-1367571-A // Transmission-equalization arrangement // Thompson George K. // American Telephone & Telegraph | |||
| Version 1 (current) | 415 kB | Shaun Ewing | Feb 08, 1921 00:00 | US-1367571-A // Transmission-equalization arrangement // Thompson George K. // American Telephone & Telegraph | ||||
| PDF File 1366414.pdf | 716 kB | Shaun Ewing | Jan 25, 1921 00:00 |
|
US-1366414-A // Means for and method of measuring weak currents // Osborne Harold S. ; Martin William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 716 kB | Shaun Ewing | Jan 25, 1921 00:00 | US-1366414-A // Means for and method of measuring weak currents // Osborne Harold S. ; Martin William H. // 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 1365710.pdf | 325 kB | Shaun Ewing | Jan 18, 1921 00:00 |
|
US-1365710-A // Collapsible wire-reel // Mcilwain Herbert A. ; Wright John W. // American Telephone & Telegraph | |||
| Version 1 (current) | 325 kB | Shaun Ewing | Jan 18, 1921 00:00 | US-1365710-A // Collapsible wire-reel // Mcilwain Herbert A. ; Wright John W. // American Telephone & Telegraph | ||||
| PDF File 1364965.pdf | 525 kB | Shaun Ewing | Jan 11, 1921 00:00 |
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US-1364965-A // Telephone-call-transfer system // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 525 kB | Shaun Ewing | Jan 11, 1921 00:00 | US-1364965-A // Telephone-call-transfer system // Toomey John F. // American Telephone & Telegraph | ||||
| PDF File 1364964.pdf | 707 kB | Shaun Ewing | Jan 11, 1921 00:00 |
|
US-1364964-A // Means for controlling repeaters // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 707 kB | Shaun Ewing | Jan 11, 1921 00:00 | US-1364964-A // Means for controlling repeaters // Toomey John F. // American Telephone & Telegraph | ||||
| PDF File 1364158.pdf | 1.65 MB | Shaun Ewing | Jan 04, 1921 00:00 |
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US-1364158-A // Method of and apparatus for testing repeater-circuits // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.65 MB | Shaun Ewing | Jan 04, 1921 00:00 | US-1364158-A // Method of and apparatus for testing repeater-circuits // Toomey John F. // American Telephone & Telegraph |
