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 2531221.pdf | 768 kB | Shaun Ewing | Nov 21, 1950 00:00 |
|
US-2531221-A // Delayed audible call signal for telephone substations // Kent Stanley B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 768 kB | Shaun Ewing | Nov 21, 1950 00:00 | US-2531221-A // Delayed audible call signal for telephone substations // Kent Stanley B. // Bell Telephone Labor Inc | ||||
| PDF File 2531230.pdf | 981 kB | Shaun Ewing | Nov 21, 1950 00:00 |
|
US-2531230-A // Electric power source // Mason Warren P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 981 kB | Shaun Ewing | Nov 21, 1950 00:00 | US-2531230-A // Electric power source // Mason Warren P. // Bell Telephone Labor Inc | ||||
| PDF File 2531242.pdf | 500 kB | Shaun Ewing | Nov 21, 1950 00:00 |
|
US-2531242-A // Electrodynamic phonograph pickup // Yenzer George R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 500 kB | Shaun Ewing | Nov 21, 1950 00:00 | US-2531242-A // Electrodynamic phonograph pickup // Yenzer George R. // Bell Telephone Labor Inc | ||||
| PDF File 2531419.pdf | 759 kB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531419-A // Hybrid branching circuits // Fox Arthur Gardner // Bell Telephone Labor Inc | |||
| Version 1 (current) | 759 kB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531419-A // Hybrid branching circuits // Fox Arthur Gardner // Bell Telephone Labor Inc | ||||
| PDF File 2531447.pdf | 2.68 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531447-A // Hybrid channel-branching microwave filter // Lewis Willard D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.68 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531447-A // Hybrid channel-branching microwave filter // Lewis Willard D. // Bell Telephone Labor Inc | ||||
| PDF File 2531600.pdf | 2.57 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531600-A // Electron beam tube filter // Barney Harold L. ; Peterson Liss C. ; Potter Ralph K. ; Sears Raymond W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.57 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531600-A // Electron beam tube filter // Barney Harold L. ; Peterson Liss C. ; Potter Ralph K. ; Sears Raymond W. // Bell Telephone Labor Inc | ||||
| PDF File 2531615.pdf | 6.69 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531615-A // Telephone system // Erwin Edson L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 6.69 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531615-A // Telephone system // Erwin Edson L. // Bell Telephone Labor Inc | ||||
| PDF File 2531622.pdf | 2.99 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531622-A // Automatic accounting device // Hague Alfred E. ; Jr. Amos E. Joel, // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.99 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531622-A // Automatic accounting device // Hague Alfred E. ; Jr. Amos E. Joel, // Bell Telephone Labor Inc | ||||
| PDF File 2531623.pdf | 1.45 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531623-A // High-frequency electronic discharge device // Hale Douglas A. S. ; Kircher Reymond J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.45 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531623-A // High-frequency electronic discharge device // Hale Douglas A. S. ; Kircher Reymond J. // Bell Telephone Labor Inc | ||||
| PDF File 2531624.pdf | 713 kB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531624-A // Selective signaling system // Hanscom Clarence D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 713 kB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531624-A // Selective signaling system // Hanscom Clarence D. // Bell Telephone Labor Inc | ||||
| PDF File 2531637.pdf | 4.88 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531637-A // Automatic call recording system for automatic telephony // Miller Charles G. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 4.88 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531637-A // Automatic call recording system for automatic telephony // Miller Charles G. // Bell Telephone Labor Inc | ||||
| PDF File 2531642.pdf | 1.36 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531642-A // Magnetic transducing system // Potter Ralph K. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.36 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531642-A // Magnetic transducing system // Potter Ralph K. // Bell Telephone Labor Inc | ||||
| PDF File 2531660.pdf | 391 kB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531660-A // Fabrication of piezoelectric crystal units // Ziegler Arthur W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 391 kB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531660-A // Fabrication of piezoelectric crystal units // Ziegler Arthur W. // Bell Telephone Labor Inc | ||||
| PDF File 2531846.pdf | 2.60 MB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2531846-A // Communication system employing pulse code modulation // Goodall William M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.60 MB | Shaun Ewing | Nov 28, 1950 00:00 | US-2531846-A // Communication system employing pulse code modulation // Goodall William M. // Bell Telephone Labor Inc | ||||
| PDF File 2532096.pdf | 656 kB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2532096-A // Power source // Hartley Ralph V. L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 656 kB | Shaun Ewing | Nov 28, 1950 00:00 | US-2532096-A // Power source // Hartley Ralph V. L. // Bell Telephone Labor Inc | ||||
| PDF File 2532097.pdf | 980 kB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2532097-A // Decentralized line switch arrangement // Hersey Ralph E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 980 kB | Shaun Ewing | Nov 28, 1950 00:00 | US-2532097-A // Decentralized line switch arrangement // Hersey Ralph E. // Bell Telephone Labor Inc | ||||
| PDF File 2532125.pdf | 720 kB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2532125-A // Selective station ringing system // Singer Fred J. ; Stacy Leland J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 720 kB | Shaun Ewing | Nov 28, 1950 00:00 | US-2532125-A // Selective station ringing system // Singer Fred J. ; Stacy Leland J. // Bell Telephone Labor Inc | ||||
| PDF File 2532133.pdf | 831 kB | Shaun Ewing | Nov 28, 1950 00:00 |
|
US-2532133-A // Volume control for telephone ringers // Whidden William E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 831 kB | Shaun Ewing | Nov 28, 1950 00:00 | US-2532133-A // Volume control for telephone ringers // Whidden William E. // Bell Telephone Labor Inc | ||||
| PDF File 2532694.pdf | 507 kB | Shaun Ewing | Dec 05, 1950 00:00 |
|
US-2532694-A // Telephone transmitter having frustoconical back electrode // Bryant Herbert W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 507 kB | Shaun Ewing | Dec 05, 1950 00:00 | US-2532694-A // Telephone transmitter having frustoconical back electrode // Bryant Herbert W. // Bell Telephone Labor Inc | ||||
| PDF File 2532697.pdf | 418 kB | Shaun Ewing | Dec 05, 1950 00:00 |
|
US-2532697-A // Voltage supply apparatus // Corbin Joseph E. ; Newhouse Russell C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 418 kB | Shaun Ewing | Dec 05, 1950 00:00 | US-2532697-A // Voltage supply apparatus // Corbin Joseph E. ; Newhouse Russell C. // Bell Telephone Labor Inc |
