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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1748239.pdf | 940 kB | Shaun Ewing | Feb 25, 1930 00:00 |
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US-1748239-A // Telephone system // Matthies William H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 940 kB | Shaun Ewing | Feb 25, 1930 00:00 | US-1748239-A // Telephone system // Matthies William H. // Bell Telephone Labor Inc | ||||
| PDF File 1747866.pdf | 654 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747866-A // Sound recording and reproducing machine // Elmer Lloyd A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 654 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747866-A // Sound recording and reproducing machine // Elmer Lloyd A. // Bell Telephone Labor Inc | ||||
| PDF File 1747863.pdf | 574 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747863-A // Electrical signaling // Dickieson Alton C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 574 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747863-A // Electrical signaling // Dickieson Alton C. // Bell Telephone Labor Inc | ||||
| PDF File 1747854.pdf | 321 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747854-A // Magnetic structure // Bozorth Richard M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 321 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747854-A // Magnetic structure // Bozorth Richard M. // Bell Telephone Labor Inc | ||||
| PDF File 1747849.pdf | 1.39 MB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747849-A // Telephone system // Strickler Walter B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.39 MB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747849-A // Telephone system // Strickler Walter B. // Bell Telephone Labor Inc | ||||
| PDF File 1747847.pdf | 436 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747847-A // Method of manufacturing acoustic radiators // Schlenker Vesper A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747847-A // Method of manufacturing acoustic radiators // Schlenker Vesper A. // Bell Telephone Labor Inc | ||||
| PDF File 1747841.pdf | 271 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747841-A // Substation apparatus // Peterson Arthur E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 271 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747841-A // Substation apparatus // Peterson Arthur E. // Bell Telephone Labor Inc | ||||
| PDF File 1747835.pdf | 503 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747835-A // Two-way signaling system // Mathes Robert C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 503 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747835-A // Two-way signaling system // Mathes Robert C. // Bell Telephone Labor Inc | ||||
| PDF File 1747833.pdf | 497 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747833-A // Telephone-switchboard system // King Gerald V. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 497 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747833-A // Telephone-switchboard system // King Gerald V. // Bell Telephone Labor Inc | ||||
| PDF File 1747830.pdf | 584 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747830-A // Acoustic horn // Harrison Henry C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 584 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747830-A // Acoustic horn // Harrison Henry C. // Bell Telephone Labor Inc | ||||
| PDF File 1747829.pdf | 253 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747829-A // Electrical reproducer // Harrison Henry C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 253 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747829-A // Electrical reproducer // Harrison Henry C. // Bell Telephone Labor Inc | ||||
| PDF File 1747821.pdf | 655 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747821-A // Supervisory system // Field Joseph C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 655 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747821-A // Supervisory system // Field Joseph C. // Bell Telephone Labor Inc | ||||
| PDF File 1747248.pdf | 841 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747248-A // Synchronizing system // Knoop William A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 841 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747248-A // Synchronizing system // Knoop William A. // Bell Telephone Labor Inc | ||||
| PDF File 1747244.pdf | 359 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747244-A // Coin-collection apparatus // Hoyt Frederick A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 359 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747244-A // Coin-collection apparatus // Hoyt Frederick A. // Bell Telephone Labor Inc | ||||
| PDF File 1747241.pdf | 1.01 MB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747241-A // Telephone system // Hinrichsen Edward E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.01 MB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747241-A // Telephone system // Hinrichsen Edward E. // Bell Telephone Labor Inc | ||||
| PDF File 1747233.pdf | 224 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747233-A // Tuning dial // Gargan John O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 224 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747233-A // Tuning dial // Gargan John O. // Bell Telephone Labor Inc | ||||
| PDF File 1747224.pdf | 1.05 MB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747224-A // Telephone-exchange system // Carpenter Warren W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.05 MB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747224-A // Telephone-exchange system // Carpenter Warren W. // Bell Telephone Labor Inc | ||||
| PDF File 1747219.pdf | 1.57 MB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747219-A // Telephone system // Bowne Langford J. ; Koechling Charles D. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.57 MB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747219-A // Telephone system // Bowne Langford J. ; Koechling Charles D. // Bell Telephone Labor Inc | ||||
| PDF File 1747169.pdf | 866 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747169-A // Connecter-switch circuits // Hovland Henry // Bell Telephone Labor Inc | |||
| Version 1 (current) | 866 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747169-A // Connecter-switch circuits // Hovland Henry // Bell Telephone Labor Inc | ||||
| PDF File 1747163.pdf | 512 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747163-A // Carrier-system-testing method and circuit // Dickieson Alton C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 512 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747163-A // Carrier-system-testing method and circuit // Dickieson Alton C. // Bell Telephone Labor Inc |
