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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1370669.pdf | 6.70 MB | Shaun Ewing | Mar 08, 1921 00:00 |
|
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 1573907.pdf | 5.21 MB | Shaun Ewing | Feb 23, 1926 00:00 |
|
US-1573907-A // Telephone-exchange system // Blauvelt William G. // American Telephone & Telegraph | |||
| Version 1 (current) | 5.21 MB | Shaun Ewing | Feb 23, 1926 00:00 | US-1573907-A // Telephone-exchange system // Blauvelt William G. // American Telephone & Telegraph | ||||
| PDF File 1563599.pdf | 4.06 MB | Shaun Ewing | Dec 01, 1925 00:00 |
|
US-1563599-A // Telephone-exchange system // Walters James N. // American Telephone & Telegraph | |||
| Version 1 (current) | 4.06 MB | Shaun Ewing | Dec 01, 1925 00:00 | US-1563599-A // Telephone-exchange system // Walters James N. // American Telephone & Telegraph | ||||
| PDF File 1537109.pdf | 3.92 MB | Shaun Ewing | May 12, 1925 00:00 |
|
US-1537109-A // Telephone system // Jr. John Davidson, // American Telephone & Telegraph | |||
| Version 1 (current) | 3.92 MB | Shaun Ewing | May 12, 1925 00:00 | US-1537109-A // Telephone system // Jr. John Davidson, // American Telephone & Telegraph | ||||
| PDF File 1620012.pdf | 3.06 MB | Shaun Ewing | Mar 08, 1927 00:00 |
|
US-1620012-A // Telephone-exchange system // Dunham Bert G. ; Haines William T. // American Telephone & Telegraph ; Western Electric Co | |||
| Version 1 (current) | 3.06 MB | Shaun Ewing | Mar 08, 1927 00:00 | US-1620012-A // Telephone-exchange system // Dunham Bert G. ; Haines William T. // American Telephone & Telegraph ; Western Electric Co | ||||
| PDF File 1746793.pdf | 2.62 MB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746793-A // Trunking system // Rhodes William A. ; Dahl Jack F. // American Telephone & Telegraph ; Western Electric Co | |||
| Version 1 (current) | 2.62 MB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746793-A // Trunking system // Rhodes William A. ; Dahl Jack F. // American Telephone & Telegraph ; Western Electric Co | ||||
| PDF File 1738519.pdf | 2.48 MB | Shaun Ewing | Dec 10, 1929 00:00 |
|
US-1738519-A // Signaling system for subscribers' telephone circuits // Abbott Henry H. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.48 MB | Shaun Ewing | Dec 10, 1929 00:00 | US-1738519-A // Signaling system for subscribers' telephone circuits // Abbott Henry H. // American Telephone & Telegraph | ||||
| PDF File 1429931.pdf | 2.46 MB | Shaun Ewing | Sept 26, 1922 00:00 |
|
US-1429931-A // Signaling circuits for toll lines // Jr. John Davidson, // American Telephone & Telegraph | |||
| Version 1 (current) | 2.46 MB | Shaun Ewing | Sept 26, 1922 00:00 | US-1429931-A // Signaling circuits for toll lines // Jr. John Davidson, // American Telephone & Telegraph | ||||
| PDF File 1473671.pdf | 2.38 MB | Shaun Ewing | Nov 13, 1923 00:00 |
|
US-1473671-A // Telephone-exchange system // Jr. John Davidson, // American Telephone & Telegraph | |||
| Version 1 (current) | 2.38 MB | Shaun Ewing | Nov 13, 1923 00:00 | US-1473671-A // Telephone-exchange system // Jr. John Davidson, // American Telephone & Telegraph | ||||
| PDF File 1419409.pdf | 2.36 MB | Shaun Ewing | Jun 13, 1922 00:00 |
|
US-1419409-A // System of telegraph distribution // Potts Louis M. // American Telephone ; Telegraph Company | |||
| Version 1 (current) | 2.36 MB | Shaun Ewing | Jun 13, 1922 00:00 | US-1419409-A // System of telegraph distribution // Potts Louis M. // American Telephone ; Telegraph Company | ||||
| PDF File 1578299.pdf | 2.35 MB | Shaun Ewing | Mar 30, 1926 00:00 |
|
US-1578299-A // Printing-telegraph system // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.35 MB | Shaun Ewing | Mar 30, 1926 00:00 | US-1578299-A // Printing-telegraph system // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 1725757.pdf | 2.22 MB | Shaun Ewing | Aug 27, 1929 00:00 |
|
US-1725757-A // Call-charging telephone-exchange system // Haines William T. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.22 MB | Shaun Ewing | Aug 27, 1929 00:00 | US-1725757-A // Call-charging telephone-exchange system // Haines William T. // American Telephone & Telegraph | ||||
| PDF File 1449382.pdf | 2.17 MB | Shaun Ewing | Mar 27, 1923 00:00 |
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US-1449382-A // Method and means for signaling with high-frequency waves // Carson John R. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.17 MB | Shaun Ewing | Mar 27, 1923 00:00 | US-1449382-A // Method and means for signaling with high-frequency waves // Carson John R. // American Telephone & Telegraph | ||||
| PDF File 1695043.pdf | 2.14 MB | Shaun Ewing | Dec 11, 1928 00:00 |
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US-1695043-A // Telephone-exchange system // Haines William T. ; Harper Robert W. // American Telephone & Telegraph ; Western Electric Co | |||
| Version 1 (current) | 2.14 MB | Shaun Ewing | Dec 11, 1928 00:00 | US-1695043-A // Telephone-exchange system // Haines William T. ; Harper Robert W. // American Telephone & Telegraph ; Western Electric Co | ||||
| PDF File 1562526.pdf | 2.12 MB | Shaun Ewing | Nov 24, 1925 00:00 |
|
US-1562526-A // Telephone-exchange system // Toomey John F. ; Phelps Henry E. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.12 MB | Shaun Ewing | Nov 24, 1925 00:00 | US-1562526-A // Telephone-exchange system // Toomey John F. ; Phelps Henry E. // American Telephone & Telegraph | ||||
| PDF File 1623139.pdf | 2.12 MB | Shaun Ewing | Apr 05, 1927 00:00 |
|
US-1623139-A // Telephone-exchange system // Toomey John F. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.12 MB | Shaun Ewing | Apr 05, 1927 00:00 | US-1623139-A // Telephone-exchange system // Toomey John F. // American Telephone & Telegraph | ||||
| PDF File 1562527.pdf | 2.05 MB | Shaun Ewing | Nov 24, 1925 00:00 |
|
US-1562527-A // Telephone-exchange system // Toomey John F. ; Phelps Henry E. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.05 MB | Shaun Ewing | Nov 24, 1925 00:00 | US-1562527-A // Telephone-exchange system // Toomey John F. ; Phelps Henry E. // American Telephone & Telegraph | ||||
| PDF File 1445759.pdf | 2.04 MB | Shaun Ewing | Feb 20, 1923 00:00 |
|
US-1445759-A // Means for and method of testing multiplex carrier circuits // Jr. John Davidson, // American Telephone & Telegraph | |||
| Version 1 (current) | 2.04 MB | Shaun Ewing | Feb 20, 1923 00:00 | US-1445759-A // Means for and method of testing multiplex carrier circuits // Jr. John Davidson, // American Telephone & Telegraph | ||||
| PDF File 1562528.pdf | 2.02 MB | Shaun Ewing | Nov 24, 1925 00:00 |
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US-1562528-A // Telephone system // Toomey John F. ; Phelps Henry E. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.02 MB | Shaun Ewing | Nov 24, 1925 00:00 | US-1562528-A // Telephone system // Toomey John F. ; Phelps Henry E. // American Telephone & Telegraph | ||||
| PDF File 1413708.pdf | 2.01 MB | Shaun Ewing | Apr 25, 1922 00:00 |
|
US-1413708-A // Signaling circuits for toll lines // Jr. John Davidson, // American Telephone & Telegraph | |||
| Version 1 (current) | 2.01 MB | Shaun Ewing | Apr 25, 1922 00:00 | US-1413708-A // Signaling circuits for toll lines // Jr. John Davidson, // American Telephone & Telegraph |
