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 1785062.pdf | 1.25 MB | Shaun Ewing | Dec 16, 1930 00:00 |
|
US-1785062-A // Transformer system // Whittle Horace // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.25 MB | Shaun Ewing | Dec 16, 1930 00:00 | US-1785062-A // Transformer system // Whittle Horace // Bell Telephone Labor Inc | ||||
| PDF File 1786652.pdf | 758 kB | Shaun Ewing | Dec 30, 1930 00:00 |
|
US-1786652-A // Electrooptical system // Hartley Ralph V. L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 758 kB | Shaun Ewing | Dec 30, 1930 00:00 | US-1786652-A // Electrooptical system // Hartley Ralph V. L. // Bell Telephone Labor Inc |
