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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1808538.pdf | 648 kB | Shaun Ewing | Jun 02, 1931 00:00 |
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US-1808538-A // Transmission regulation // Gabriel John C. ; Hubbard Frank A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 648 kB | Shaun Ewing | Jun 02, 1931 00:00 | US-1808538-A // Transmission regulation // Gabriel John C. ; Hubbard Frank A. // Bell Telephone Labor Inc | ||||
| PDF File 1808540.pdf | 392 kB | Shaun Ewing | Jun 02, 1931 00:00 |
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US-1808540-A // Signaling system // Gilbert John J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 392 kB | Shaun Ewing | Jun 02, 1931 00:00 | US-1808540-A // Signaling system // Gilbert John J. // Bell Telephone Labor Inc | ||||
| PDF File 1808577.pdf | 3.25 MB | Shaun Ewing | Jun 02, 1931 00:00 |
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US-1808577-A // Automatic telephone exchange system // Scudder Frederick J. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 3.25 MB | Shaun Ewing | Jun 02, 1931 00:00 | US-1808577-A // Automatic telephone exchange system // Scudder Frederick J. // Bell Telephone Labor Inc | ||||
| PDF File 1808902.pdf | 222 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1808902-A // Telephone plug // Mueller Emil C. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 222 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1808902-A // Telephone plug // Mueller Emil C. // Bell Telephone Labor Inc | ||||
| PDF File 1808915.pdf | 846 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1808915-A // Repeater circuits // Bjornson Bjorn G. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 846 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1808915-A // Repeater circuits // Bjornson Bjorn G. // Bell Telephone Labor Inc | ||||
| PDF File 1808923.pdf | 567 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1808923-A // Synchronizing system // Horton Joseph W. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 567 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1808923-A // Synchronizing system // Horton Joseph W. // Bell Telephone Labor Inc | ||||
| PDF File 1809025.pdf | 299 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809025-A // Electrical device // Cruser Victor I. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 299 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809025-A // Electrical device // Cruser Victor I. // Bell Telephone Labor Inc | ||||
| PDF File 1809039.pdf | 912 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809039-A // Telephone exchange system // Hovland Henry // Bell Telephone Labor Inc | |||
| Version 1 (current) | 912 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809039-A // Telephone exchange system // Hovland Henry // Bell Telephone Labor Inc | ||||
| PDF File 1809042.pdf | 263 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809042-A // Magnet core // Kelsall George A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 263 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809042-A // Magnet core // Kelsall George A. // Bell Telephone Labor Inc | ||||
| PDF File 1809043.pdf | 577 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809043-A // Printing telegraph system // Knoop William A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 577 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809043-A // Printing telegraph system // Knoop William A. // Bell Telephone Labor Inc | ||||
| PDF File 1809095.pdf | 193 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809095-A // Process of coating thermionic cathodes // Wilson James R. ; Blackburn Charles M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 193 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809095-A // Process of coating thermionic cathodes // Wilson James R. ; Blackburn Charles M. // Bell Telephone Labor Inc | ||||
| PDF File 1809124.pdf | 1.20 MB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809124-A // Telephone exchange system // Hovland Henry // Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.20 MB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809124-A // Telephone exchange system // Hovland Henry // Bell Telephone Labor Inc | ||||
| PDF File 1809125.pdf | 397 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809125-A // Telephone set mounting // Hoyt Frederick A. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 397 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809125-A // Telephone set mounting // Hoyt Frederick A. // Bell Telephone Labor Inc | ||||
| PDF File 1809684.pdf | 565 kB | Shaun Ewing | Jun 09, 1931 00:00 |
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US-1809684-A // Sound recording and reproducing instrument // Flanders Paul B. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 565 kB | Shaun Ewing | Jun 09, 1931 00:00 | US-1809684-A // Sound recording and reproducing instrument // Flanders Paul B. // Bell Telephone Labor Inc | ||||
| PDF File 1809828.pdf | 549 kB | Shaun Ewing | Jun 16, 1931 00:00 |
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US-1809828-A // Telephone transmission // Buckley Oliver E. ; Hartley Ralph V. L. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 549 kB | Shaun Ewing | Jun 16, 1931 00:00 | US-1809828-A // Telephone transmission // Buckley Oliver E. ; Hartley Ralph V. L. // Bell Telephone Labor Inc | ||||
| PDF File 1809832.pdf | 513 kB | Shaun Ewing | Jun 16, 1931 00:00 |
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US-1809832-A // Synchronous driving system // Curtis Austen M. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 513 kB | Shaun Ewing | Jun 16, 1931 00:00 | US-1809832-A // Synchronous driving system // Curtis Austen M. // Bell Telephone Labor Inc | ||||
| PDF File 1809841.pdf | 276 kB | Shaun Ewing | Jun 16, 1931 00:00 |
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US-1809841-A // Impulse transmitter // Goff Harold W. ; Forsberg Oscar F. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 276 kB | Shaun Ewing | Jun 16, 1931 00:00 | US-1809841-A // Impulse transmitter // Goff Harold W. ; Forsberg Oscar F. // Bell Telephone Labor Inc | ||||
| PDF File 1809879.pdf | 568 kB | Shaun Ewing | Jun 16, 1931 00:00 |
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US-1809879-A // Circuits for electromagnetic devices // Whittle Horace // Bell Telephone Labor Inc | |||
| Version 1 (current) | 568 kB | Shaun Ewing | Jun 16, 1931 00:00 | US-1809879-A // Circuits for electromagnetic devices // Whittle Horace // Bell Telephone Labor Inc | ||||
| PDF File 1809887.pdf | 460 kB | Shaun Ewing | Jun 16, 1931 00:00 |
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US-1809887-A // Adapter // Broadwell Howard // Bell Telephone Labor Inc | |||
| Version 1 (current) | 460 kB | Shaun Ewing | Jun 16, 1931 00:00 | US-1809887-A // Adapter // Broadwell Howard // Bell Telephone Labor Inc | ||||
| PDF File 1810004.pdf | 880 kB | Shaun Ewing | Jun 16, 1931 00:00 |
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US-1810004-A // Voice operated relay circuits // Bjornson Bjorn G. // Bell Telephone Labor Inc | |||
| Version 1 (current) | 880 kB | Shaun Ewing | Jun 16, 1931 00:00 | US-1810004-A // Voice operated relay circuits // Bjornson Bjorn G. // Bell Telephone Labor Inc |
