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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1799174.pdf | 334 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799174-A // Protective device // Loye Donald P. // American Telephone & Telegraph | |||
| Version 1 (current) | 334 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799174-A // Protective device // Loye Donald P. // American Telephone & Telegraph | ||||
| PDF File 1799188.pdf | 694 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799188-A // Cross-talk reduction // Weaver Myron A. // American Telephone & Telegraph | |||
| Version 1 (current) | 694 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799188-A // Cross-talk reduction // Weaver Myron A. // American Telephone & Telegraph | ||||
| PDF File 1799679.pdf | 670 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) | 670 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 1800303.pdf | 833 kB | Shaun Ewing | Apr 14, 1931 00:00 |
|
US-1800303-A // Automatic regulating arrangement // Lindsay Russell H. // American Telephone & Telegraph | |||
| Version 1 (current) | 833 kB | Shaun Ewing | Apr 14, 1931 00:00 | US-1800303-A // Automatic regulating arrangement // Lindsay Russell H. // American Telephone & Telegraph | ||||
| PDF File 1800304.pdf | 1.17 MB | Shaun Ewing | Apr 14, 1931 00:00 |
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US-1800304-A // Relay-regulating circuits // Lindsay Russell H. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.17 MB | Shaun Ewing | Apr 14, 1931 00:00 | US-1800304-A // Relay-regulating circuits // Lindsay Russell H. // American Telephone & Telegraph | ||||
| PDF File 1800305.pdf | 981 kB | Shaun Ewing | Apr 14, 1931 00:00 |
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US-1800305-A // Relay-regulating circuits // Lindsay Russell H. // American Telephone & Telegraph | |||
| Version 1 (current) | 981 kB | Shaun Ewing | Apr 14, 1931 00:00 | US-1800305-A // Relay-regulating circuits // Lindsay Russell H. // American Telephone & Telegraph | ||||
| PDF File 1801342.pdf | 611 kB | Shaun Ewing | Apr 21, 1931 00:00 |
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US-1801342-A // Electrical network // Gannett Danforth K. ; Kirkwood Maclean // American Telephone & Telegraph | |||
| Version 1 (current) | 611 kB | Shaun Ewing | Apr 21, 1931 00:00 | US-1801342-A // Electrical network // Gannett Danforth K. ; Kirkwood Maclean // American Telephone & Telegraph | ||||
| PDF File 1801380.pdf | 302 kB | Shaun Ewing | Apr 21, 1931 00:00 |
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US-1801380-A // Signaling system // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 302 kB | Shaun Ewing | Apr 21, 1931 00:00 | US-1801380-A // Signaling system // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 1802419.pdf | 884 kB | Shaun Ewing | Apr 28, 1931 00:00 |
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US-1802419-A // Gear mechanism // Freeman Albert E. ; Livermore William T. // American Telephone & Telegraph | |||
| Version 1 (current) | 884 kB | Shaun Ewing | Apr 28, 1931 00:00 | US-1802419-A // Gear mechanism // Freeman Albert E. ; Livermore William T. // American Telephone & Telegraph | ||||
| PDF File 1802420.pdf | 1.21 MB | Shaun Ewing | Apr 28, 1931 00:00 |
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US-1802420-A // Method of utilizing a wide frequency range for signaling channels // Green Estill I. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.21 MB | Shaun Ewing | Apr 28, 1931 00:00 | US-1802420-A // Method of utilizing a wide frequency range for signaling channels // Green Estill I. // American Telephone & Telegraph | ||||
| PDF File 1802446.pdf | 340 kB | Shaun Ewing | Apr 28, 1931 00:00 |
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US-1802446-A // Telephone system // Schneckloth Harry H. // American Telephone & Telegraph | |||
| Version 1 (current) | 340 kB | Shaun Ewing | Apr 28, 1931 00:00 | US-1802446-A // Telephone system // Schneckloth Harry H. // American Telephone & Telegraph | ||||
| PDF File 1803453.pdf | 290 kB | Shaun Ewing | May 05, 1931 00:00 |
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US-1803453-A // System for communicating with moving vehicles // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 290 kB | Shaun Ewing | May 05, 1931 00:00 | US-1803453-A // System for communicating with moving vehicles // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1803454.pdf | 376 kB | Shaun Ewing | May 05, 1931 00:00 |
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US-1803454-A // System for communicating with moving vehicles // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 376 kB | Shaun Ewing | May 05, 1931 00:00 | US-1803454-A // System for communicating with moving vehicles // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1803466.pdf | 227 kB | Shaun Ewing | May 05, 1931 00:00 |
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US-1803466-A // Ticket-distributing system // Drew George A. // American Telephone & Telegraph | |||
| Version 1 (current) | 227 kB | Shaun Ewing | May 05, 1931 00:00 | US-1803466-A // Ticket-distributing system // Drew George A. // American Telephone & Telegraph | ||||
| PDF File 1804526.pdf | 406 kB | Shaun Ewing | May 12, 1931 00:00 |
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US-1804526-A // Radio receiving circuit // Coxhead Harry B. // American Telephone & Telegraph | |||
| Version 1 (current) | 406 kB | Shaun Ewing | May 12, 1931 00:00 | US-1804526-A // Radio receiving circuit // Coxhead Harry B. // American Telephone & Telegraph | ||||
| PDF File 1804547.pdf | 494 kB | Shaun Ewing | May 12, 1931 00:00 |
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US-1804547-A // Telegraph repeater arrangement // Shanck Roy B. // American Telephone & Telegraph | |||
| Version 1 (current) | 494 kB | Shaun Ewing | May 12, 1931 00:00 | US-1804547-A // Telegraph repeater arrangement // Shanck Roy B. // American Telephone & Telegraph | ||||
| PDF File 1804548.pdf | 2.60 MB | Shaun Ewing | May 12, 1931 00:00 |
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US-1804548-A // Telegraph exchange system // Vernam Gilbert S. // American Telephone & Telegraph | |||
| Version 1 (current) | 2.60 MB | Shaun Ewing | May 12, 1931 00:00 | US-1804548-A // Telegraph exchange system // Vernam Gilbert S. // American Telephone & Telegraph | ||||
| PDF File 1805591.pdf | 445 kB | Shaun Ewing | May 19, 1931 00:00 |
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US-1805591-A // Signaling system // Ohl Russell S. // American Telephone & Telegraph | |||
| Version 1 (current) | 445 kB | Shaun Ewing | May 19, 1931 00:00 | US-1805591-A // Signaling system // Ohl Russell S. // American Telephone & Telegraph | ||||
| PDF File 1805594.pdf | 444 kB | Shaun Ewing | May 19, 1931 00:00 |
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US-1805594-A // Communicating system // Papker Ralzemond D. // American Telephone & Telegraph | |||
| Version 1 (current) | 444 kB | Shaun Ewing | May 19, 1931 00:00 | US-1805594-A // Communicating system // Papker Ralzemond D. // American Telephone & Telegraph | ||||
| PDF File 1805596.pdf | 802 kB | Shaun Ewing | May 19, 1931 00:00 |
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US-1805596-A // Signaling system // Potter Ralph K. // American Telephone & Telegraph | |||
| Version 1 (current) | 802 kB | Shaun Ewing | May 19, 1931 00:00 | US-1805596-A // Signaling system // Potter Ralph K. // American Telephone & Telegraph |
