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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1391006.pdf | 267 kB | Shaun Ewing | Sept 20, 1921 00:00 |
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US-1391006-A // Half-duplex alternating-current telegraph system // Parker Ralzemond D. // American Telephone & Telegraph | |||
| Version 1 (current) | 267 kB | Shaun Ewing | Sept 20, 1921 00:00 | US-1391006-A // Half-duplex alternating-current telegraph system // Parker Ralzemond D. // American Telephone & Telegraph | ||||
| PDF File 1390580.pdf | 530 kB | Shaun Ewing | Sept 13, 1921 00:00 |
|
US-1390580-A // Means for reducing interference // Osborne Harold S. // American Telephone & Telegraph | |||
| Version 1 (current) | 530 kB | Shaun Ewing | Sept 13, 1921 00:00 | US-1390580-A // Means for reducing interference // Osborne Harold S. // American Telephone & Telegraph | ||||
| PDF File 1390545.pdf | 436 kB | Shaun Ewing | Sept 13, 1921 00:00 |
|
US-1390545-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Sept 13, 1921 00:00 | US-1390545-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | ||||
| PDF File 1389596.pdf | 450 kB | Shaun Ewing | Sept 06, 1921 00:00 |
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US-1389596-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | |||
| Version 1 (current) | 450 kB | Shaun Ewing | Sept 06, 1921 00:00 | US-1389596-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | ||||
| PDF File 1386977.pdf | 444 kB | Shaun Ewing | Aug 09, 1921 00:00 |
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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 1385777.pdf | 359 kB | Shaun Ewing | Jul 26, 1921 00:00 |
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US-1385777-A // Grid-circuits for electron-tubes // Clark Alva B. // American Telephone & Telegraph | |||
| Version 1 (current) | 359 kB | Shaun Ewing | Jul 26, 1921 00:00 | US-1385777-A // Grid-circuits for electron-tubes // Clark Alva B. // American Telephone & Telegraph | ||||
| PDF File 1384994.pdf | 961 kB | Shaun Ewing | Jul 19, 1921 00:00 |
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US-1384994-A // Telephone repeater equipment // Demarest Charles S. ; Clark Alva B. ; Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 961 kB | Shaun Ewing | Jul 19, 1921 00:00 | US-1384994-A // Telephone repeater equipment // Demarest Charles S. ; Clark Alva B. ; Crisson George // American Telephone & Telegraph | ||||
| PDF File 1383750.pdf | 1.04 MB | Shaun Ewing | Jul 05, 1921 00:00 |
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US-1383750-A // Alternating-current signaling system // Parker Ralzemond D. ; Hamilton Baxter P. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.04 MB | Shaun Ewing | Jul 05, 1921 00:00 | US-1383750-A // Alternating-current signaling system // Parker Ralzemond D. ; Hamilton Baxter P. // American Telephone & Telegraph | ||||
| PDF File 1375414.pdf | 910 kB | Shaun Ewing | Apr 19, 1921 00:00 |
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US-1375414-A // Apparatus for testing capacity deviations and unbalance of electric conductors // Osborne Harold S. // American Telephone & Telegraph | |||
| Version 1 (current) | 910 kB | Shaun Ewing | Apr 19, 1921 00:00 | US-1375414-A // Apparatus for testing capacity deviations and unbalance of electric conductors // Osborne Harold S. // American Telephone & Telegraph | ||||
| PDF File 1375405.pdf | 753 kB | Shaun Ewing | Apr 19, 1921 00:00 |
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US-1375405-A // Apparatus for testing capacity of electric conductors // Martin William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 753 kB | Shaun Ewing | Apr 19, 1921 00:00 | US-1375405-A // Apparatus for testing capacity of electric conductors // Martin William H. // American Telephone & Telegraph | ||||
| PDF File 1374219.pdf | 460 kB | Shaun Ewing | Apr 12, 1921 00:00 |
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US-1374219-A // Composite transmission system // Osborne Harold S. // American Telephone & Telegraph | |||
| Version 1 (current) | 460 kB | Shaun Ewing | Apr 12, 1921 00:00 | US-1374219-A // Composite transmission system // Osborne Harold S. // American Telephone & Telegraph | ||||
| PDF File 1373504.pdf | 363 kB | Shaun Ewing | Apr 05, 1921 00:00 |
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US-1373504-A // Electrical measuring apparatus // Hitchcock Harry W. // American Telephone & Telegraph | |||
| Version 1 (current) | 363 kB | Shaun Ewing | Apr 05, 1921 00:00 | US-1373504-A // Electrical measuring apparatus // Hitchcock Harry W. // American Telephone & Telegraph | ||||
| PDF File 1372838.pdf | 398 kB | Shaun Ewing | Mar 29, 1921 00:00 |
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US-1372838-A // Pole-derrick // Smith Temple C. // American Telephone & Telegraph | |||
| Version 1 (current) | 398 kB | Shaun Ewing | Mar 29, 1921 00:00 | US-1372838-A // Pole-derrick // Smith Temple C. // American Telephone & Telegraph | ||||
| PDF File 1372050.pdf | 1.05 MB | Shaun Ewing | Mar 22, 1921 00:00 |
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US-1372050-A // Busy-signal-testing apparatus // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.05 MB | Shaun Ewing | Mar 22, 1921 00:00 | US-1372050-A // Busy-signal-testing apparatus // Toomey John F. // American Telephone & Telegraph | ||||
| PDF File 1372042.pdf | 450 kB | Shaun Ewing | Mar 22, 1921 00:00 |
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US-1372042-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | |||
| Version 1 (current) | 450 kB | Shaun Ewing | Mar 22, 1921 00:00 | US-1372042-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | ||||
| PDF File 1371298.pdf | 347 kB | Shaun Ewing | Mar 15, 1921 00:00 |
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US-1371298-A // Telephone and call signal system // Clark Alva B. // American Telephone & Telegraph | |||
| Version 1 (current) | 347 kB | Shaun Ewing | Mar 15, 1921 00:00 | US-1371298-A // Telephone and call signal system // Clark Alva B. // American Telephone & Telegraph | ||||
| PDF File 1370669.pdf | 6.70 MB | Shaun Ewing | Mar 08, 1921 00:00 |
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US-1370669-A // Machine-telegraph // Potts Louis M. // American Telephone & Telegraph | |||
| Version 1 (current) | 6.70 MB | Shaun Ewing | Mar 08, 1921 00:00 | US-1370669-A // Machine-telegraph // Potts Louis M. // American Telephone & Telegraph | ||||
| PDF File 1370562.pdf | 419 kB | Shaun Ewing | Mar 08, 1921 00:00 |
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US-1370562-A // Trunk-circuits // Shackleton Samuel P. // American Telephone & Telegraph | |||
| Version 1 (current) | 419 kB | Shaun Ewing | Mar 08, 1921 00:00 | US-1370562-A // Trunk-circuits // Shackleton Samuel P. // American Telephone & Telegraph | ||||
| PDF File 1370558.pdf | 441 kB | Shaun Ewing | Mar 08, 1921 00:00 |
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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 1369828.pdf | 315 kB | Shaun Ewing | Mar 01, 1921 00:00 |
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US-1369828-A // Cable-hanger // Matthews Edgar M. // American Telephone & Telegraph | |||
| Version 1 (current) | 315 kB | Shaun Ewing | Mar 01, 1921 00:00 | US-1369828-A // Cable-hanger // Matthews Edgar M. // American Telephone & Telegraph |
