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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2253085.pdf | 314 kB | Shaun Ewing | Aug 19, 1941 00:00 |
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US-2253085-A // Machine tool // Morrell Millard E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 314 kB | Shaun Ewing | Aug 19, 1941 00:00 | US-2253085-A // Machine tool // Morrell Millard E. // Bell Telephone Labor Inc | ||||
| PDF File 2253079.pdf | 1.08 MB | Shaun Ewing | Aug 19, 1941 00:00 |
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US-2253079-A // Electrical transmission circuit // Macnair Walter A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.08 MB | Shaun Ewing | Aug 19, 1941 00:00 | US-2253079-A // Electrical transmission circuit // Macnair Walter A. // Bell Telephone Labor Inc | ||||
| PDF File 2252899.pdf | 361 kB | Shaun Ewing | Aug 19, 1941 00:00 |
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US-2252899-A // Method of manufacturing contact springs // Reynolds John N. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 361 kB | Shaun Ewing | Aug 19, 1941 00:00 | US-2252899-A // Method of manufacturing contact springs // Reynolds John N. // Bell Telephone Labor Inc | ||||
| PDF File 2252875.pdf | 641 kB | Shaun Ewing | Aug 19, 1941 00:00 |
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US-2252875-A // Call transmitter device // Wheeler Clyde H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 641 kB | Shaun Ewing | Aug 19, 1941 00:00 | US-2252875-A // Call transmitter device // Wheeler Clyde H. // Bell Telephone Labor Inc | ||||
| PDF File 2252870.pdf | 1.44 MB | Shaun Ewing | Aug 19, 1941 00:00 |
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US-2252870-A // Carrier frequency heterodyne oscillator // Slonczewski Thaddeus // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.44 MB | Shaun Ewing | Aug 19, 1941 00:00 | US-2252870-A // Carrier frequency heterodyne oscillator // Slonczewski Thaddeus // Bell Telephone Labor Inc | ||||
| PDF File 2252766.pdf | 1014 kB | Shaun Ewing | Aug 19, 1941 00:00 |
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US-2252766-A // Signaling system // Holden William H. T. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1014 kB | Shaun Ewing | Aug 19, 1941 00:00 | US-2252766-A // Signaling system // Holden William H. T. // Bell Telephone Labor Inc | ||||
| PDF File 2252747.pdf | 631 kB | Shaun Ewing | Aug 19, 1941 00:00 |
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US-2252747-A // Neutralizing arrangement for telegraph circuits // Wilkerson Jefferson R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 631 kB | Shaun Ewing | Aug 19, 1941 00:00 | US-2252747-A // Neutralizing arrangement for telegraph circuits // Wilkerson Jefferson R. // Bell Telephone Labor Inc | ||||
| PDF File 2252679.pdf | 510 kB | Shaun Ewing | Aug 12, 1941 00:00 |
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US-2252679-A // Preventing singing in telephone repeaters // Hawkins Russell S. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 510 kB | Shaun Ewing | Aug 12, 1941 00:00 | US-2252679-A // Preventing singing in telephone repeaters // Hawkins Russell S. // Bell Telephone Labor Inc | ||||
| PDF File 2252629.pdf | 1023 kB | Shaun Ewing | Aug 12, 1941 00:00 |
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US-2252629-A // Supervisory signal system // Hanley Frank Harold ; Carter Frank J. ; Davidsmeyer Orville Howard ; Lamberson Otha M. // American Telephone & Telegraph ; Bell Telephone Labor Inc | |||
| Version 1 (current) | 1023 kB | Shaun Ewing | Aug 12, 1941 00:00 | US-2252629-A // Supervisory signal system // Hanley Frank Harold ; Carter Frank J. ; Davidsmeyer Orville Howard ; Lamberson Otha M. // American Telephone & Telegraph ; Bell Telephone Labor Inc | ||||
| PDF File 2252503.pdf | 1.62 MB | Shaun Ewing | Aug 12, 1941 00:00 |
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US-2252503-A // Generation and transmission of high frequency oscillations // Bowen Arnold E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.62 MB | Shaun Ewing | Aug 12, 1941 00:00 | US-2252503-A // Generation and transmission of high frequency oscillations // Bowen Arnold E. // Bell Telephone Labor Inc | ||||
| PDF File 2252293.pdf | 518 kB | Shaun Ewing | Aug 12, 1941 00:00 |
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US-2252293-A // Modulation system // Ohl Russell S. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 518 kB | Shaun Ewing | Aug 12, 1941 00:00 | US-2252293-A // Modulation system // Ohl Russell S. // Bell Telephone Labor Inc | ||||
| PDF File 2251933.pdf | 549 kB | Shaun Ewing | Aug 12, 1941 00:00 |
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US-2251933-A // Switching device // Harrison Henry C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 549 kB | Shaun Ewing | Aug 12, 1941 00:00 | US-2251933-A // Switching device // Harrison Henry C. // Bell Telephone Labor Inc | ||||
| PDF File 2251356.pdf | 378 kB | Shaun Ewing | Aug 05, 1941 00:00 |
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US-2251356-A // Constant coefficient mechanical element // Harris James E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 378 kB | Shaun Ewing | Aug 05, 1941 00:00 | US-2251356-A // Constant coefficient mechanical element // Harris James E. // Bell Telephone Labor Inc | ||||
| PDF File 2251346.pdf | 597 kB | Shaun Ewing | Aug 05, 1941 00:00 |
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US-2251346-A // Telephone system // Vroom Edward // Bell Telephone Labor Inc | |||
| Version 1 (current) | 597 kB | Shaun Ewing | Aug 05, 1941 00:00 | US-2251346-A // Telephone system // Vroom Edward // Bell Telephone Labor Inc | ||||
| PDF File 2251332.pdf | 992 kB | Shaun Ewing | Aug 05, 1941 00:00 |
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US-2251332-A // Cathode ray device // Gray Frank // Bell Telephone Labor Inc | |||
| Version 1 (current) | 992 kB | Shaun Ewing | Aug 05, 1941 00:00 | US-2251332-A // Cathode ray device // Gray Frank // Bell Telephone Labor Inc | ||||
| PDF File 2251322.pdf | 259 kB | Shaun Ewing | Aug 05, 1941 00:00 |
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US-2251322-A // Telegraphone // Buhrendorf Frederick G. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 259 kB | Shaun Ewing | Aug 05, 1941 00:00 | US-2251322-A // Telegraphone // Buhrendorf Frederick G. // Bell Telephone Labor Inc | ||||
| PDF File 2251276.pdf | 1.27 MB | Shaun Ewing | Aug 05, 1941 00:00 |
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US-2251276-A // Circuits for directionally controlling signal transmission in twoway signal transmission systems // Fisher Harold J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.27 MB | Shaun Ewing | Aug 05, 1941 00:00 | US-2251276-A // Circuits for directionally controlling signal transmission in twoway signal transmission systems // Fisher Harold J. // Bell Telephone Labor Inc | ||||
| PDF File 2251073.pdf | 1.76 MB | Shaun Ewing | Jul 29, 1941 00:00 |
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US-2251073-A // Coin collector // Shann Oscar A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.76 MB | Shaun Ewing | Jul 29, 1941 00:00 | US-2251073-A // Coin collector // Shann Oscar A. // Bell Telephone Labor Inc | ||||
| PDF File 2251056.pdf | 244 kB | Shaun Ewing | Jul 29, 1941 00:00 |
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US-2251056-A // Dust excluding device // Irwin James R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 244 kB | Shaun Ewing | Jul 29, 1941 00:00 | US-2251056-A // Dust excluding device // Irwin James R. // Bell Telephone Labor Inc | ||||
| PDF File 2251044.pdf | 653 kB | Shaun Ewing | Jul 29, 1941 00:00 |
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US-2251044-A // Regulator system // Fairweather Burton A. ; Terry Donald M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 653 kB | Shaun Ewing | Jul 29, 1941 00:00 | US-2251044-A // Regulator system // Fairweather Burton A. ; Terry Donald M. // Bell Telephone Labor Inc |
