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 1788734.pdf | 939 kB | Shaun Ewing | Jan 13, 1931 00:00 |
|
US-1788734-A // Regulator system // Morton Edmund R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 939 kB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788734-A // Regulator system // Morton Edmund R. // Bell Telephone Labor Inc | ||||
| PDF File 1788736.pdf | 800 kB | Shaun Ewing | Jan 13, 1931 00:00 |
|
US-1788736-A // Echo-suppressing and energy-limiting circuits // O'Neill Henry W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 800 kB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788736-A // Echo-suppressing and energy-limiting circuits // O'Neill Henry W. // Bell Telephone Labor Inc | ||||
| PDF File 1788747.pdf | 596 kB | Shaun Ewing | Jan 13, 1931 00:00 |
|
US-1788747-A // Telephone desk set // Scharringhausen William H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 596 kB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788747-A // Telephone desk set // Scharringhausen William H. // Bell Telephone Labor Inc | ||||
| PDF File 1792479.pdf | 235 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792479-A // Alarm system // Bennett Arthur F. ; Mitchell Clifford E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 235 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792479-A // Alarm system // Bennett Arthur F. ; Mitchell Clifford E. // Bell Telephone Labor Inc | ||||
| PDF File 1792483.pdf | 325 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792483-A // Magnetic material // Elmen Gustaf W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 325 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792483-A // Magnetic material // Elmen Gustaf W. // Bell Telephone Labor Inc | ||||
| PDF File 1792494.pdf | 145 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792494-A // Phonographic needle // Harrison Henry C. ; Anderson Harvey A. // Bell Telephone Lab Incorproate | |||
| Version 1 (current) | 145 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792494-A // Phonographic needle // Harrison Henry C. ; Anderson Harvey A. // Bell Telephone Lab Incorproate | ||||
| PDF File 1792496.pdf | 302 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792496-A // Switching device // Hinshaw Foster A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 302 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792496-A // Switching device // Hinshaw Foster A. // Bell Telephone Labor Inc | ||||
| PDF File 1792497.pdf | 411 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792497-A // Vibration-damping device // Keller Arthur C. ; Norton Edward L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 411 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792497-A // Vibration-damping device // Keller Arthur C. ; Norton Edward L. // Bell Telephone Labor Inc | ||||
| PDF File 1792512.pdf | 459 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792512-A // Electromagnetic device // Siegmund Humphreys O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 459 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792512-A // Electromagnetic device // Siegmund Humphreys O. // Bell Telephone Labor Inc | ||||
| PDF File 1792536.pdf | 843 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792536-A // Sound radiator // Harrison Henry C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 843 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792536-A // Sound radiator // Harrison Henry C. // Bell Telephone Labor Inc | ||||
| PDF File 1792538.pdf | 1.02 MB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792538-A // Telephone system // Hersey Ralph E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.02 MB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792538-A // Telephone system // Hersey Ralph E. // Bell Telephone Labor Inc | ||||
| PDF File 1792552.pdf | 236 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792552-A // Method of forming contacts // Siegmund Humphreys O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 236 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792552-A // Method of forming contacts // Siegmund Humphreys O. // Bell Telephone Labor Inc | ||||
| PDF File 1792630.pdf | 537 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792630-A // Frequency-setting fork // Curtis Austen M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 537 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792630-A // Frequency-setting fork // Curtis Austen M. // Bell Telephone Labor Inc | ||||
| PDF File 1792637.pdf | 433 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792637-A // Vibration-transmission system // Harrison Henry C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 433 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792637-A // Vibration-transmission system // Harrison Henry C. // Bell Telephone Labor Inc | ||||
| PDF File 1792650.pdf | 570 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792650-A // Regulator system // Manderfeld Emanuel C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 570 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792650-A // Regulator system // Manderfeld Emanuel C. // Bell Telephone Labor Inc | ||||
| PDF File 1792655.pdf | 1.11 MB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1792655-A // Sound reproducer // Norton Edward L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.11 MB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792655-A // Sound reproducer // Norton Edward L. // Bell Telephone Labor Inc | ||||
| PDF File 1793254.pdf | 375 kB | Shaun Ewing | Feb 17, 1931 00:00 |
|
US-1793254-A // Lock // Shann Oscar A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 375 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1793254-A // Lock // Shann Oscar A. // Bell Telephone Labor Inc | ||||
| PDF File 1793491.pdf | 679 kB | Shaun Ewing | Feb 24, 1931 00:00 |
|
US-1793491-A // Current-limiting device // Jones Theodore A. ; Phelps Walter A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 679 kB | Shaun Ewing | Feb 24, 1931 00:00 | US-1793491-A // Current-limiting device // Jones Theodore A. ; Phelps Walter A. // Bell Telephone Labor Inc | ||||
| PDF File 1793835.pdf | 1.07 MB | Shaun Ewing | Feb 24, 1931 00:00 |
|
US-1793835-A // Electrical testing // Bruce Edmond // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.07 MB | Shaun Ewing | Feb 24, 1931 00:00 | US-1793835-A // Electrical testing // Bruce Edmond // Bell Telephone Labor Inc | ||||
| PDF File 1795439.pdf | 781 kB | Shaun Ewing | Mar 10, 1931 00:00 |
|
US-1795439-A // Magnetic device // Pratt Edward J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 781 kB | Shaun Ewing | Mar 10, 1931 00:00 | US-1795439-A // Magnetic device // Pratt Edward J. // Bell Telephone Labor Inc |
