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 2503414.pdf | 2.29 MB | Shaun Ewing | Apr 11, 1950 00:00 |
|
US-2503414-A // Telegraph switching system // Roberts Leland C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.29 MB | Shaun Ewing | Apr 11, 1950 00:00 | US-2503414-A // Telegraph switching system // Roberts Leland C. // Bell Telephone Labor Inc | ||||
| PDF File 2503405.pdf | 720 kB | Shaun Ewing | Apr 11, 1950 00:00 |
|
US-2503405-A // Control and indicator apparatus for rectifiers // Olmstead Noel C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 720 kB | Shaun Ewing | Apr 11, 1950 00:00 | US-2503405-A // Control and indicator apparatus for rectifiers // Olmstead Noel C. // Bell Telephone Labor Inc | ||||
| PDF File 2503402.pdf | 1.14 MB | Shaun Ewing | Apr 11, 1950 00:00 |
|
US-2503402-A // Selective mechanism // Mcdavitt Marcellus B. ; Mitchell Doren // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.14 MB | Shaun Ewing | Apr 11, 1950 00:00 | US-2503402-A // Selective mechanism // Mcdavitt Marcellus B. ; Mitchell Doren // Bell Telephone Labor Inc | ||||
| PDF File 2503400.pdf | 889 kB | Shaun Ewing | Apr 11, 1950 00:00 |
|
US-2503400-A // Testing tank arranged for suppression of reflected compressional waves // Mason Warren P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 889 kB | Shaun Ewing | Apr 11, 1950 00:00 | US-2503400-A // Testing tank arranged for suppression of reflected compressional waves // Mason Warren P. // Bell Telephone Labor Inc | ||||
| PDF File 2503391.pdf | 815 kB | Shaun Ewing | Apr 11, 1950 00:00 |
|
US-2503391-A // Automatic volume control // Kannenberg Walter F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 815 kB | Shaun Ewing | Apr 11, 1950 00:00 | US-2503391-A // Automatic volume control // Kannenberg Walter F. // Bell Telephone Labor Inc | ||||
| PDF File 2503371.pdf | 662 kB | Shaun Ewing | Apr 11, 1950 00:00 |
|
US-2503371-A // Selective signaling system // Bachelet Albert E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 662 kB | Shaun Ewing | Apr 11, 1950 00:00 | US-2503371-A // Selective signaling system // Bachelet Albert E. // Bell Telephone Labor Inc | ||||
| PDF File 2503000.pdf | 459 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2503000-A // Carrier telegraphy // Shanck Roy B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 459 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2503000-A // Carrier telegraphy // Shanck Roy B. // Bell Telephone Labor Inc | ||||
| PDF File 2502999.pdf | 578 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502999-A // Telephone coin collector with pile-up leveling means // Shann Oscar A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 578 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502999-A // Telephone coin collector with pile-up leveling means // Shann Oscar A. // Bell Telephone Labor Inc | ||||
| PDF File 2502942.pdf | 678 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502942-A // Regenerative relay repeater // Goodall William M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 678 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502942-A // Regenerative relay repeater // Goodall William M. // Bell Telephone Labor Inc | ||||
| PDF File 2502915.pdf | 537 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502915-A // Control knob device // Atkins George E. ; Mead Edward D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 537 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502915-A // Control knob device // Atkins George E. ; Mead Edward D. // Bell Telephone Labor Inc | ||||
| PDF File 2502842.pdf | 856 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502842-A // Electromagnetic relay // Hickman Clarence N. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 856 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502842-A // Electromagnetic relay // Hickman Clarence N. // Bell Telephone Labor Inc | ||||
| PDF File 2502837.pdf | 1.29 MB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502837-A // Position indicating system // Entz Ferdinand S. ; Pullis George A. ; Stibitz George R. // Bell Telephone Labor Inc ; Us Director Of The Office Of S | |||
| Version 1 (current) | 1.29 MB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502837-A // Position indicating system // Entz Ferdinand S. ; Pullis George A. ; Stibitz George R. // Bell Telephone Labor Inc ; Us Director Of The Office Of S | ||||
| PDF File 2502822.pdf | 969 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502822-A // Electron tube coupling circuit // Burton Everett T. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 969 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502822-A // Electron tube coupling circuit // Burton Everett T. // Bell Telephone Labor Inc | ||||
| PDF File 2502820.pdf | 446 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502820-A // Private branch exchange system with means for preventing interference from unbalanceconditions // Bowne Langford J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 446 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502820-A // Private branch exchange system with means for preventing interference from unbalanceconditions // Bowne Langford J. // Bell Telephone Labor Inc | ||||
| PDF File 2502531.pdf | 884 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502531-A // Electron discharge device // Morton Jack A. ; Ryder Robert M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 884 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502531-A // Electron discharge device // Morton Jack A. ; Ryder Robert M. // Bell Telephone Labor Inc | ||||
| PDF File 2502530.pdf | 992 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502530-A // Electron discharge device for ultra high frequencies // Morton Jack A. ; Vance Robert L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 992 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502530-A // Electron discharge device for ultra high frequencies // Morton Jack A. ; Vance Robert L. // Bell Telephone Labor Inc | ||||
| PDF File 2502488.pdf | 329 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502488-A // Semiconductor amplifier // Shockley William // Bell Telephone Labor Inc | |||
| Version 1 (current) | 329 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502488-A // Semiconductor amplifier // Shockley William // Bell Telephone Labor Inc | ||||
| PDF File 2502479.pdf | 797 kB | Shaun Ewing | Apr 04, 1950 00:00 |
|
US-2502479-A // Semiconductor amplifier // Pearson Gerald L. ; Shockley William // Bell Telephone Labor Inc | |||
| Version 1 (current) | 797 kB | Shaun Ewing | Apr 04, 1950 00:00 | US-2502479-A // Semiconductor amplifier // Pearson Gerald L. ; Shockley William // Bell Telephone Labor Inc | ||||
| PDF File 2502307.pdf | 602 kB | Shaun Ewing | Mar 28, 1950 00:00 |
|
US-2502307-A // Electrical connector // Bascom Henry M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 602 kB | Shaun Ewing | Mar 28, 1950 00:00 | US-2502307-A // Electrical connector // Bascom Henry M. // Bell Telephone Labor Inc | ||||
| PDF File 2502304.pdf | 491 kB | Shaun Ewing | Mar 28, 1950 00:00 |
|
US-2502304-A // Method of forming expanded plastic materials // Baker William O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 491 kB | Shaun Ewing | Mar 28, 1950 00:00 | US-2502304-A // Method of forming expanded plastic materials // Baker William O. // Bell Telephone Labor Inc |
