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 1746808.pdf | 1.74 MB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746808-A // Power-line signaling // Wolfe Wallace V. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.74 MB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746808-A // Power-line signaling // Wolfe Wallace V. // Bell Telephone Labor Inc | ||||
| PDF File 1746803.pdf | 282 kB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746803-A // Balanced radio receiving system // Stevenson George H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 282 kB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746803-A // Balanced radio receiving system // Stevenson George H. // Bell Telephone Labor Inc | ||||
| PDF File 1746800.pdf | 177 kB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746800-A // Telephone receiver // Seacord Kenneth P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 177 kB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746800-A // Telephone receiver // Seacord Kenneth P. // Bell Telephone Labor Inc | ||||
| PDF File 1746788.pdf | 357 kB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746788-A // Piezo-electric device // Marrison Warren A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 357 kB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746788-A // Piezo-electric device // Marrison Warren A. // Bell Telephone Labor Inc | ||||
| PDF File 1746730.pdf | 179 kB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746730-A // Reproducing apparatus // Jones Warren C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 179 kB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746730-A // Reproducing apparatus // Jones Warren C. // Bell Telephone Labor Inc | ||||
| PDF File 1746729.pdf | 703 kB | Shaun Ewing | Feb 11, 1930 00:00 |
|
US-1746729-A // Electrooptical system // Ives Herbert E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 703 kB | Shaun Ewing | Feb 11, 1930 00:00 | US-1746729-A // Electrooptical system // Ives Herbert E. // Bell Telephone Labor Inc | ||||
| PDF File 1745756.pdf | 357 kB | Shaun Ewing | Feb 04, 1930 00:00 |
|
US-1745756-A // Electrical picture-transmission receiving system // Gray Frank // Bell Telephone Labor Inc | |||
| Version 1 (current) | 357 kB | Shaun Ewing | Feb 04, 1930 00:00 | US-1745756-A // Electrical picture-transmission receiving system // Gray Frank // Bell Telephone Labor Inc | ||||
| PDF File 1745680.pdf | 501 kB | Shaun Ewing | Feb 04, 1930 00:00 |
|
US-1745680-A // Continuously-loaded telephone or telegraph cable // Kemp Archie R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 501 kB | Shaun Ewing | Feb 04, 1930 00:00 | US-1745680-A // Continuously-loaded telephone or telegraph cable // Kemp Archie R. // Bell Telephone Labor Inc | ||||
| PDF File 1745612.pdf | 88 kB | Shaun Ewing | Feb 04, 1930 00:00 |
|
US-1745612-A // Nonmagnetic material // Elmen Gustaf W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 88 kB | Shaun Ewing | Feb 04, 1930 00:00 | US-1745612-A // Nonmagnetic material // Elmen Gustaf W. // Bell Telephone Labor Inc | ||||
| PDF File 1744047.pdf | 355 kB | Shaun Ewing | Jan 21, 1930 00:00 |
|
US-1744047-A // Combined recorder and reproducer // Keller Arthur C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 355 kB | Shaun Ewing | Jan 21, 1930 00:00 | US-1744047-A // Combined recorder and reproducer // Keller Arthur C. // Bell Telephone Labor Inc | ||||
| PDF File 1743711.pdf | 487 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743711-A // Supervisory system // Field Joseph C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 487 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743711-A // Supervisory system // Field Joseph C. // Bell Telephone Labor Inc | ||||
| PDF File 1743710.pdf | 703 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743710-A // Secrecy system for signaling // Englund Carl R. ; Llewfllyn Frederick B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 703 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743710-A // Secrecy system for signaling // Englund Carl R. ; Llewfllyn Frederick B. // Bell Telephone Labor Inc | ||||
| PDF File 1743708.pdf | 412 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743708-A // Telephone system // Collis Raymond E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 412 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743708-A // Telephone system // Collis Raymond E. // Bell Telephone Labor Inc | ||||
| PDF File 1743478.pdf | 293 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743478-A // Magnetic device // Pratt Edward J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 293 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743478-A // Magnetic device // Pratt Edward J. // Bell Telephone Labor Inc | ||||
| PDF File 1743470.pdf | 259 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743470-A // Magnetic device // Mead Edward D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 259 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743470-A // Magnetic device // Mead Edward D. // Bell Telephone Labor Inc | ||||
| PDF File 1743456.pdf | 235 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743456-A // Sound recording // Keith Clyde R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 235 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743456-A // Sound recording // Keith Clyde R. // Bell Telephone Labor Inc | ||||
| PDF File 1743453.pdf | 319 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743453-A // Electromagnetic device // Hillhouse John T.e. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 319 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743453-A // Electromagnetic device // Hillhouse John T.e. // Bell Telephone Labor Inc | ||||
| PDF File 1743429.pdf | 1.66 MB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743429-A // Telephone-exchange system // Clark Edgar H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.66 MB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743429-A // Telephone-exchange system // Clark Edgar H. // Bell Telephone Labor Inc | ||||
| PDF File 1743415.pdf | 676 kB | Shaun Ewing | Jan 14, 1930 00:00 |
|
US-1743415-A // Telephone-exchange system // Wilbur Ray S. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 676 kB | Shaun Ewing | Jan 14, 1930 00:00 | US-1743415-A // Telephone-exchange system // Wilbur Ray S. // Bell Telephone Labor Inc | ||||
| PDF File 1742930.pdf | 610 kB | Shaun Ewing | Jan 07, 1930 00:00 |
|
US-1742930-A // Telephone system // Paine Robert C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 610 kB | Shaun Ewing | Jan 07, 1930 00:00 | US-1742930-A // Telephone system // Paine Robert C. // Bell Telephone Labor Inc |
