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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1788534.pdf | 1.27 MB | Shaun Ewing | Jan 13, 1931 00:00 |
|
US-1788534-A // Acoustic phase-shifting device // Mason Warren P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.27 MB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788534-A // Acoustic phase-shifting device // Mason Warren P. // Bell Telephone Labor Inc | ||||
| PDF File 1788533.pdf | 1.01 MB | Shaun Ewing | Jan 13, 1931 00:00 |
|
US-1788533-A // Frequency-control system // Marrison Warren A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.01 MB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788533-A // Frequency-control system // Marrison Warren A. // Bell Telephone Labor Inc | ||||
| PDF File 1788532.pdf | 748 kB | Shaun Ewing | Jan 13, 1931 00:00 |
|
US-1788532-A // Electron-tube circuit // Llewellyn Frederick B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 748 kB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788532-A // Electron-tube circuit // Llewellyn Frederick B. // Bell Telephone Labor Inc | ||||
| PDF File 1788528.pdf | 2.40 MB | Shaun Ewing | Jan 13, 1931 00:00 |
|
US-1788528-A // Telephone system // Koechling Charles D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.40 MB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788528-A // Telephone system // Koechling Charles D. // Bell Telephone Labor Inc | ||||
| PDF File 1788526.pdf | 605 kB | Shaun Ewing | Jan 13, 1931 00:00 |
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US-1788526-A // Artificial line // Johnson Kenneth S. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 605 kB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788526-A // Artificial line // Johnson Kenneth S. // Bell Telephone Labor Inc | ||||
| PDF File 1788521.pdf | 725 kB | Shaun Ewing | Jan 13, 1931 00:00 |
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US-1788521-A // Short-wave amplifying system // Heising Raymond A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 725 kB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788521-A // Short-wave amplifying system // Heising Raymond A. // Bell Telephone Labor Inc | ||||
| PDF File 1788513.pdf | 1.82 MB | Shaun Ewing | Jan 13, 1931 00:00 |
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US-1788513-A // Signal and control system // Fultz Miles E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.82 MB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788513-A // Signal and control system // Fultz Miles E. // Bell Telephone Labor Inc | ||||
| PDF File 1788487.pdf | 939 kB | Shaun Ewing | Jan 13, 1931 00:00 |
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US-1788487-A // Vibration transmission system // Harrison Henry C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 939 kB | Shaun Ewing | Jan 13, 1931 00:00 | US-1788487-A // Vibration transmission system // Harrison Henry C. // Bell Telephone Labor Inc | ||||
| PDF File 1788035.pdf | 456 kB | Shaun Ewing | Jan 06, 1931 00:00 |
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US-1788035-A // Volume-control circuits // Stevenson George H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 456 kB | Shaun Ewing | Jan 06, 1931 00:00 | US-1788035-A // Volume-control circuits // Stevenson George H. // Bell Telephone Labor Inc | ||||
| PDF File 1788031.pdf | 302 kB | Shaun Ewing | Jan 06, 1931 00:00 |
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US-1788031-A // Forming tool // Pritchard William T. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 302 kB | Shaun Ewing | Jan 06, 1931 00:00 | US-1788031-A // Forming tool // Pritchard William T. // Bell Telephone Labor Inc | ||||
| PDF File 1788030.pdf | 427 kB | Shaun Ewing | Jan 06, 1931 00:00 |
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US-1788030-A // Telephone instrument // Penn Julius H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 427 kB | Shaun Ewing | Jan 06, 1931 00:00 | US-1788030-A // Telephone instrument // Penn Julius H. // Bell Telephone Labor Inc | ||||
| PDF File 1788007.pdf | 929 kB | Shaun Ewing | Jan 06, 1931 00:00 |
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US-1788007-A // Telephone repeater system // Abbott Henry H. ; Entz Ferdinand S. // American Telephone & Telegraph ; Bell Telephone Labor Inc | |||
| Version 1 (current) | 929 kB | Shaun Ewing | Jan 06, 1931 00:00 | US-1788007-A // Telephone repeater system // Abbott Henry H. ; Entz Ferdinand S. // American Telephone & Telegraph ; Bell Telephone Labor Inc | ||||
| PDF File 1787606.pdf | 175 kB | Shaun Ewing | Jan 06, 1931 00:00 |
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US-1787606-A // Magnetic material // White John H. ; Legg Victor E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 175 kB | Shaun Ewing | Jan 06, 1931 00:00 | US-1787606-A // Magnetic material // White John H. ; Legg Victor E. // Bell Telephone Labor Inc |
