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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| 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 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 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 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 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 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 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 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 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 1390545.pdf | 436 kB | Shaun Ewing | Sept 13, 1921 00:00 |
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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 1390580.pdf | 530 kB | Shaun Ewing | Sept 13, 1921 00:00 |
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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 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 1391552.pdf | 641 kB | Shaun Ewing | Sept 20, 1921 00:00 |
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US-1391552-A // Repeater cord-circuits // Loynes Owen H. ; Rose Arthur F. // American Telephone & Telegraph | |||
| Version 1 (current) | 641 kB | Shaun Ewing | Sept 20, 1921 00:00 | US-1391552-A // Repeater cord-circuits // Loynes Owen H. ; Rose Arthur F. // American Telephone & Telegraph | ||||
| PDF File 1392152.pdf | 447 kB | Shaun Ewing | Sept 27, 1921 00:00 |
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US-1392152-A // Multiple-station transmission-circuits // Harden William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 447 kB | Shaun Ewing | Sept 27, 1921 00:00 | US-1392152-A // Multiple-station transmission-circuits // Harden William H. // American Telephone & Telegraph | ||||
| PDF File 1392179.pdf | 1.76 MB | Shaun Ewing | Sept 27, 1921 00:00 |
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US-1392179-A // Operator's trunk-circuit // Kuhn George W. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.76 MB | Shaun Ewing | Sept 27, 1921 00:00 | US-1392179-A // Operator's trunk-circuit // Kuhn George W. // American Telephone & Telegraph | ||||
| PDF File 1394062.pdf | 1.22 MB | Shaun Ewing | Oct 18, 1921 00:00 |
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US-1394062-A // Means for and method of reducing cross-talk in four-wire circuits // Blackwell Otto B. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.22 MB | Shaun Ewing | Oct 18, 1921 00:00 | US-1394062-A // Means for and method of reducing cross-talk in four-wire circuits // Blackwell Otto B. // American Telephone & Telegraph | ||||
| PDF File 1394189.pdf | 950 kB | Shaun Ewing | Oct 18, 1921 00:00 |
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US-1394189-A // Repeater-controlling system for four-wire circuits // Demarest Charles S. // American Telephone & Telegraph | |||
| Version 1 (current) | 950 kB | Shaun Ewing | Oct 18, 1921 00:00 | US-1394189-A // Repeater-controlling system for four-wire circuits // Demarest Charles S. // American Telephone & Telegraph | ||||
| PDF File 1394190.pdf | 468 kB | Shaun Ewing | Oct 18, 1921 00:00 |
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US-1394190-A // Testing system for four-wire circuits // Demarest Charles S. // American Telephone & Telegraph | |||
| Version 1 (current) | 468 kB | Shaun Ewing | Oct 18, 1921 00:00 | US-1394190-A // Testing system for four-wire circuits // Demarest Charles S. // American Telephone & Telegraph | ||||
| PDF File 1395007.pdf | 438 kB | Shaun Ewing | Oct 25, 1921 00:00 |
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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 1395854.pdf | 682 kB | Shaun Ewing | Nov 01, 1921 00:00 |
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US-1395854-A // Balancing signaling systems // Martin William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 682 kB | Shaun Ewing | Nov 01, 1921 00:00 | US-1395854-A // Balancing signaling systems // Martin William H. // American Telephone & Telegraph |
