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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1800372.pdf | 384 kB | Shaun Ewing | Apr 14, 1931 00:00 |
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US-1800372-A // Frequency-translating circuit // Black Harold S. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 384 kB | Shaun Ewing | Apr 14, 1931 00:00 | US-1800372-A // Frequency-translating circuit // Black Harold S. // Bell Telephone Labor Inc | ||||
| PDF File 1799811.pdf | 626 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799811-A // Signaling system // Gooderham John W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 626 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799811-A // Signaling system // Gooderham John W. // Bell Telephone Labor Inc | ||||
| PDF File 1799810.pdf | 1.10 MB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799810-A // Transmission circuits // Fry Thornton C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.10 MB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799810-A // Transmission circuits // Fry Thornton C. // Bell Telephone Labor Inc | ||||
| PDF File 1799800.pdf | 228 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799800-A // Adjustable inductance coil // Lane Clarence E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 228 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799800-A // Adjustable inductance coil // Lane Clarence E. // Bell Telephone Labor Inc | ||||
| PDF File 1799799.pdf | 262 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799799-A // Sound reproducer // Jones Warren C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 262 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799799-A // Sound reproducer // Jones Warren C. // Bell Telephone Labor Inc | ||||
| PDF File 1799796.pdf | 1.25 MB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799796-A // Telephone-exchange system // Hovland Henry // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.25 MB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799796-A // Telephone-exchange system // Hovland Henry // Bell Telephone Labor Inc | ||||
| PDF File 1799795.pdf | 672 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799795-A // Sound recording and reproducing // Horton Joseph W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 672 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799795-A // Sound recording and reproducing // Horton Joseph W. // Bell Telephone Labor Inc | ||||
| PDF File 1799794.pdf | 583 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799794-A // Artificial line // Jr. Arthur W. Horton, // Bell Telephone Labor Inc | |||
| Version 1 (current) | 583 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799794-A // Artificial line // Jr. Arthur W. Horton, // Bell Telephone Labor Inc | ||||
| PDF File 1799686.pdf | 529 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799686-A // Impulse transmitter // Goff Harold W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 529 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799686-A // Impulse transmitter // Goff Harold W. // Bell Telephone Labor Inc | ||||
| PDF File 1799679.pdf | 785 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799679-A // Telephone-exchange system // Dunham Bert G. ; Fairbairn Rhys A. // Bell Telephone Labor Inc ; American Telephone & Telegraph | |||
| Version 1 (current) | 785 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799679-A // Telephone-exchange system // Dunham Bert G. ; Fairbairn Rhys A. // Bell Telephone Labor Inc ; American Telephone & Telegraph | ||||
| PDF File 1799654.pdf | 2.33 MB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799654-A // Telephone-exchange system // Stokely Ray L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 2.33 MB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799654-A // Telephone-exchange system // Stokely Ray L. // Bell Telephone Labor Inc | ||||
| PDF File 1799653.pdf | 1.46 MB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799653-A // Telephone system // Stokely Ray L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.46 MB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799653-A // Telephone system // Stokely Ray L. // Bell Telephone Labor Inc | ||||
| PDF File 1799651.pdf | 389 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799651-A // Electrical switching apparatus // Siegmund Humphreys O. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 389 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799651-A // Electrical switching apparatus // Siegmund Humphreys O. // Bell Telephone Labor Inc | ||||
| PDF File 1799627.pdf | 1.71 MB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799627-A // Signal-interpolating system // Knoop William A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.71 MB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799627-A // Signal-interpolating system // Knoop William A. // Bell Telephone Labor Inc | ||||
| PDF File 1799223.pdf | 548 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799223-A // Party-line message-register system // Fowler Clarence B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 548 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799223-A // Party-line message-register system // Fowler Clarence B. // Bell Telephone Labor Inc | ||||
| PDF File 1799214.pdf | 3.49 MB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799214-A // Submarine telegraph system // Clokey Allison A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 3.49 MB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799214-A // Submarine telegraph system // Clokey Allison A. // Bell Telephone Labor Inc | ||||
| PDF File 1798243.pdf | 1.39 MB | Shaun Ewing | Mar 31, 1931 00:00 |
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US-1798243-A // Electrical transmission system // Whittle Horace ; Hilton Linwood B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.39 MB | Shaun Ewing | Mar 31, 1931 00:00 | US-1798243-A // Electrical transmission system // Whittle Horace ; Hilton Linwood B. // Bell Telephone Labor Inc | ||||
| PDF File 1796965.pdf | 1.08 MB | Shaun Ewing | Mar 17, 1931 00:00 |
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US-1796965-A // Method of and means for signaling // Ryan Francis M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.08 MB | Shaun Ewing | Mar 17, 1931 00:00 | US-1796965-A // Method of and means for signaling // Ryan Francis M. // Bell Telephone Labor Inc | ||||
| PDF File 1796931.pdf | 1.20 MB | Shaun Ewing | Mar 17, 1931 00:00 |
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US-1796931-A // Electrooptical transmission // Ives Herbert E. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.20 MB | Shaun Ewing | Mar 17, 1931 00:00 | US-1796931-A // Electrooptical transmission // Ives Herbert E. // Bell Telephone Labor Inc | ||||
| PDF File 1795924.pdf | 679 kB | Shaun Ewing | Mar 10, 1931 00:00 |
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US-1795924-A // Relay circuits // Bjornson Bjorn G. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 679 kB | Shaun Ewing | Mar 10, 1931 00:00 | US-1795924-A // Relay circuits // Bjornson Bjorn G. // Bell Telephone Labor Inc |
