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 1846261.pdf | 5.21 MB | Shaun Ewing | Feb 23, 1932 00:00 |
|
US-1846261-A // Telephone system // Kittredge Linus E. // American Telephone & Telegraph | |||
| Version 1 (current) | 5.21 MB | Shaun Ewing | Feb 23, 1932 00:00 | US-1846261-A // Telephone system // Kittredge Linus E. // American Telephone & Telegraph | ||||
| PDF File 2161376.pdf | 5.08 MB | Shaun Ewing | Jun 06, 1939 00:00 |
|
US-2161376-A // Telephone system // Moody Dwight Lyman ; Newby Neal Dow ; Shipley Frank Foster // American Telephone & Telegraph | |||
| Version 1 (current) | 5.08 MB | Shaun Ewing | Jun 06, 1939 00:00 | US-2161376-A // Telephone system // Moody Dwight Lyman ; Newby Neal Dow ; Shipley Frank Foster // American Telephone & Telegraph | ||||
| PDF File 2056347.pdf | 3.64 MB | Shaun Ewing | Oct 06, 1936 00:00 |
|
US-2056347-A // Signaling system // Demarest Charles Sidney ; Radcliff John P. // American Telephone & Telegraph | |||
| Version 1 (current) | 3.64 MB | Shaun Ewing | Oct 06, 1936 00:00 | US-2056347-A // Signaling system // Demarest Charles Sidney ; Radcliff John P. // American Telephone & Telegraph | ||||
| PDF File 1846516.pdf | 3.31 MB | Shaun Ewing | Feb 23, 1932 00:00 |
|
US-1846516-A // Telephone system // Haines William T. // American Telephone & Telegraph | |||
| Version 1 (current) | 3.31 MB | Shaun Ewing | Feb 23, 1932 00:00 | US-1846516-A // Telephone system // Haines William T. // American Telephone & Telegraph | ||||
| PDF File 1837316.pdf | 2.93 MB | Shaun Ewing | Dec 22, 1931 00:00 |
|
US-1837316-A // Voice operated control arrangement for telephone cable systems // Crisson George ; Wright Sumner B. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.93 MB | Shaun Ewing | Dec 22, 1931 00:00 | US-1837316-A // Voice operated control arrangement for telephone cable systems // Crisson George ; Wright Sumner B. // American Telephone & Telegraph | ||||
| PDF File 1798235.pdf | 2.90 MB | Shaun Ewing | Mar 31, 1931 00:00 |
|
US-1798235-A // Printing-telegraph switching system // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.90 MB | Shaun Ewing | Mar 31, 1931 00:00 | US-1798235-A // Printing-telegraph switching system // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 2121498.pdf | 2.83 MB | Shaun Ewing | Jun 21, 1938 00:00 |
|
US-2121498-A // Call distributing telephone system // Dunning Sanford F. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.83 MB | Shaun Ewing | Jun 21, 1938 00:00 | US-2121498-A // Call distributing telephone system // Dunning Sanford F. // American Telephone & Telegraph | ||||
| PDF File 1816634.pdf | 2.83 MB | Shaun Ewing | Jul 28, 1931 00:00 |
|
US-1816634-A // Telephone exchange system // Carpenter Warren W. ; Dahl Jack F. ; Davis Richard C. ; Kittredge Linus E. // Bell Telephone Labor Inc ; American Telephone & Telegraph | |||
| Version 1 (current) | 2.83 MB | Shaun Ewing | Jul 28, 1931 00:00 | US-1816634-A // Telephone exchange system // Carpenter Warren W. ; Dahl Jack F. ; Davis Richard C. ; Kittredge Linus E. // Bell Telephone Labor Inc ; American Telephone & Telegraph | ||||
| PDF File 1846262.pdf | 2.81 MB | Shaun Ewing | Feb 23, 1932 00:00 |
|
US-1846262-A // Telephone system // Kittredge Linus E. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.81 MB | Shaun Ewing | Feb 23, 1932 00:00 | US-1846262-A // Telephone system // Kittredge Linus E. // American Telephone & Telegraph | ||||
| PDF File 2129711.pdf | 2.80 MB | Shaun Ewing | Sept 13, 1938 00:00 |
|
US-2129711-A // Guided transmission of ultra high frequency waves // Southworth George Clark // American Telephone & Telegraph | |||
| Version 1 (current) | 2.80 MB | Shaun Ewing | Sept 13, 1938 00:00 | US-2129711-A // Guided transmission of ultra high frequency waves // Southworth George Clark // American Telephone & Telegraph | ||||
| PDF File 1804548.pdf | 2.60 MB | Shaun Ewing | May 12, 1931 00:00 |
|
US-1804548-A // Telegraph exchange system // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.60 MB | Shaun Ewing | May 12, 1931 00:00 | US-1804548-A // Telegraph exchange system // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 2129712.pdf | 2.48 MB | Shaun Ewing | Sept 13, 1938 00:00 |
|
US-2129712-A // Transmission of energy effects by guided electric waves in a dielectric medium // Southworth George C. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.48 MB | Shaun Ewing | Sept 13, 1938 00:00 | US-2129712-A // Transmission of energy effects by guided electric waves in a dielectric medium // Southworth George C. // American Telephone & Telegraph | ||||
| PDF File 2064905.pdf | 2.44 MB | Shaun Ewing | Dec 22, 1936 00:00 |
|
US-2064905-A // Common medium multichannel exchange system // Green Estill Ibbotson // American Telephone & Telegraph | |||
| Version 1 (current) | 2.44 MB | Shaun Ewing | Dec 22, 1936 00:00 | US-2064905-A // Common medium multichannel exchange system // Green Estill Ibbotson // American Telephone & Telegraph | ||||
| PDF File 2064896.pdf | 2.42 MB | Shaun Ewing | Dec 22, 1936 00:00 |
|
US-2064896-A // Common medium multichannel exchange system // Espenschied Lloyd ; Green Estill I. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.42 MB | Shaun Ewing | Dec 22, 1936 00:00 | US-2064896-A // Common medium multichannel exchange system // Espenschied Lloyd ; Green Estill I. // American Telephone & Telegraph | ||||
| PDF File 1835031.pdf | 2.41 MB | Shaun Ewing | Dec 08, 1931 00:00 |
|
US-1835031-A // Concentric conducting system // Espenschied Lloyd ; Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.41 MB | Shaun Ewing | Dec 08, 1931 00:00 | US-1835031-A // Concentric conducting system // Espenschied Lloyd ; Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 2064904.pdf | 2.34 MB | Shaun Ewing | Dec 22, 1936 00:00 |
|
US-2064904-A // Common medium multichannel exchange system // Green Estill I. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.34 MB | Shaun Ewing | Dec 22, 1936 00:00 | US-2064904-A // Common medium multichannel exchange system // Green Estill I. // American Telephone & Telegraph | ||||
| PDF File 2035577.pdf | 2.29 MB | Shaun Ewing | Mar 31, 1936 00:00 |
|
US-2035577-A // Printing telegraph exchange system // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.29 MB | Shaun Ewing | Mar 31, 1936 00:00 | US-2035577-A // Printing telegraph exchange system // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 2132684.pdf | 2.25 MB | Shaun Ewing | Oct 11, 1938 00:00 |
|
US-2132684-A // Printing telegraph automatic exchange system // Gardner Leland A. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.25 MB | Shaun Ewing | Oct 11, 1938 00:00 | US-2132684-A // Printing telegraph automatic exchange system // Gardner Leland A. // American Telephone & Telegraph | ||||
| PDF File 1958930.pdf | 2.19 MB | Shaun Ewing | May 15, 1934 00:00 |
|
US-1958930-A // Automatic switching telegraph private branch exchange system // Singer Fred J. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.19 MB | Shaun Ewing | May 15, 1934 00:00 | US-1958930-A // Automatic switching telegraph private branch exchange system // Singer Fred J. // American Telephone & Telegraph | ||||
| PDF File 1850146.pdf | 2.14 MB | Shaun Ewing | Mar 22, 1932 00:00 |
|
US-1850146-A // Electrical wave filter // Zobel Otto J. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.14 MB | Shaun Ewing | Mar 22, 1932 00:00 | US-1850146-A // Electrical wave filter // Zobel Otto J. // American Telephone & Telegraph |
