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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1819649.pdf | 885 kB | Shaun Ewing | Aug 18, 1931 00:00 |
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US-1819649-A // Wave transmission system // Mathes Robert C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 885 kB | Shaun Ewing | Aug 18, 1931 00:00 | US-1819649-A // Wave transmission system // Mathes Robert C. // Bell Telephone Labor Inc | ||||
| PDF File 1819675.pdf | 310 kB | Shaun Ewing | Aug 18, 1931 00:00 |
|
US-1819675-A // Switch // Chaplin Merle P. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 310 kB | Shaun Ewing | Aug 18, 1931 00:00 | US-1819675-A // Switch // Chaplin Merle P. // Bell Telephone Labor Inc | ||||
| PDF File 1821076.pdf | 600 kB | Shaun Ewing | Sept 01, 1931 00:00 |
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US-1821076-A // Amplifying system // Peterson Eugene // Bell Telephone Labor Inc | |||
| Version 1 (current) | 600 kB | Shaun Ewing | Sept 01, 1931 00:00 | US-1821076-A // Amplifying system // Peterson Eugene // Bell Telephone Labor Inc | ||||
| PDF File 1821586.pdf | 977 kB | Shaun Ewing | Sept 01, 1931 00:00 |
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US-1821586-A // Acoustic device // Smythe Edwin H. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 977 kB | Shaun Ewing | Sept 01, 1931 00:00 | US-1821586-A // Acoustic device // Smythe Edwin H. // Bell Telephone Labor Inc | ||||
| PDF File 1822535.pdf | 437 kB | Shaun Ewing | Sept 08, 1931 00:00 |
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US-1822535-A // Mounting for vacuum tubes // Lum George R. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 437 kB | Shaun Ewing | Sept 08, 1931 00:00 | US-1822535-A // Mounting for vacuum tubes // Lum George R. // Bell Telephone Labor Inc | ||||
| PDF File 1823040.pdf | 4.28 MB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823040-A // Call charging telephone exchange system // Hague Alfred E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 4.28 MB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823040-A // Call charging telephone exchange system // Hague Alfred E. // Bell Telephone Labor Inc | ||||
| PDF File 1823085.pdf | 202 kB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823085-A // Show case // Campbell Thaddeus C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 202 kB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823085-A // Show case // Campbell Thaddeus C. // Bell Telephone Labor Inc | ||||
| PDF File 1823088.pdf | 818 kB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823088-A // Submarine cable repeating system // Clokey Allison A. ; Burton Everett T. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 818 kB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823088-A // Submarine cable repeating system // Clokey Allison A. ; Burton Everett T. // Bell Telephone Labor Inc | ||||
| PDF File 1823091.pdf | 686 kB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823091-A // Indicating and recording system // Dahl Jack F. ; Davis Richard C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 686 kB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823091-A // Indicating and recording system // Dahl Jack F. ; Davis Richard C. // Bell Telephone Labor Inc | ||||
| PDF File 1823120.pdf | 3.27 MB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823120-A // Signaling and communication system // O'Neill Henry W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 3.27 MB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823120-A // Signaling and communication system // O'Neill Henry W. // Bell Telephone Labor Inc | ||||
| PDF File 1823323.pdf | 464 kB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823323-A // Desk telephone set // Hopkins Irving L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 464 kB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823323-A // Desk telephone set // Hopkins Irving L. // Bell Telephone Labor Inc | ||||
| PDF File 1823354.pdf | 4.00 MB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823354-A // High speed submarine cable telegraph system // Dowd Andrew D. ; Kerr Mark B. ; Locke George A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 4.00 MB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823354-A // High speed submarine cable telegraph system // Dowd Andrew D. ; Kerr Mark B. ; Locke George A. // Bell Telephone Labor Inc | ||||
| PDF File 1823659.pdf | 836 kB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823659-A // Wave transmission system // Miller Robert A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 836 kB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823659-A // Wave transmission system // Miller Robert A. // Bell Telephone Labor Inc | ||||
| PDF File 1823664.pdf | 411 kB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823664-A // Circuit maker and breaker // Pascarella Anthony J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 411 kB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823664-A // Circuit maker and breaker // Pascarella Anthony J. // Bell Telephone Labor Inc | ||||
| PDF File 1823667.pdf | 1.77 MB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823667-A // Trunking system // Powell Albert C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.77 MB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823667-A // Trunking system // Powell Albert C. // Bell Telephone Labor Inc | ||||
| PDF File 1823678.pdf | 527 kB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823678-A // Cabinet for portable testing apparatus // Bowman Herman N. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 527 kB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823678-A // Cabinet for portable testing apparatus // Bowman Herman N. // Bell Telephone Labor Inc | ||||
| PDF File 1823679.pdf | 2.55 MB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823679-A // Call charging telephone exchange system // Busch Aloysius J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.55 MB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823679-A // Call charging telephone exchange system // Busch Aloysius J. // Bell Telephone Labor Inc | ||||
| PDF File 1823688.pdf | 1.41 MB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823688-A // Telephone exchange system // Hovland Henry // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.41 MB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823688-A // Telephone exchange system // Hovland Henry // Bell Telephone Labor Inc | ||||
| PDF File 1823739.pdf | 1.23 MB | Shaun Ewing | Sept 15, 1931 00:00 |
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US-1823739-A // System operating on a marginal current basis // Horton Joseph W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.23 MB | Shaun Ewing | Sept 15, 1931 00:00 | US-1823739-A // System operating on a marginal current basis // Horton Joseph W. // Bell Telephone Labor Inc | ||||
| PDF File 1827191.pdf | 431 kB | Shaun Ewing | Oct 13, 1931 00:00 |
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US-1827191-A // Shielded inductance // Casper William L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 431 kB | Shaun Ewing | Oct 13, 1931 00:00 | US-1827191-A // Shielded inductance // Casper William L. // Bell Telephone Labor Inc |
