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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2024280.pdf | 459 kB | Shaun Ewing | Dec 17, 1935 00:00 |
|
US-2024280-A // Means to reduce the effect of interfering currents on telephone circuits // Edwards William Hopple ; Dietze Eginhard // American Telephone & Telegraph | |||
| Version 1 (current) | 459 kB | Shaun Ewing | Dec 17, 1935 00:00 | US-2024280-A // Means to reduce the effect of interfering currents on telephone circuits // Edwards William Hopple ; Dietze Eginhard // American Telephone & Telegraph | ||||
| PDF File 1852051.pdf | 459 kB | Shaun Ewing | Apr 05, 1932 00:00 |
|
US-1852051-A // Telegraph repeater system // Hamilton Baxter P. ; Rea Wilton T. // American Telephone & Telegraph | |||
| Version 1 (current) | 459 kB | Shaun Ewing | Apr 05, 1932 00:00 | US-1852051-A // Telegraph repeater system // Hamilton Baxter P. ; Rea Wilton T. // American Telephone & Telegraph | ||||
| PDF File 2138147.pdf | 458 kB | Shaun Ewing | Nov 29, 1938 00:00 |
|
US-2138147-A // Time of day announcing system // Drum George Frederick // American Telephone & Telegraph | |||
| Version 1 (current) | 458 kB | Shaun Ewing | Nov 29, 1938 00:00 | US-2138147-A // Time of day announcing system // Drum George Frederick // American Telephone & Telegraph | ||||
| PDF File 1868579.pdf | 457 kB | Shaun Ewing | Jul 26, 1932 00:00 |
|
US-1868579-A // Broad-band audio-amplifier // Lane Elmer Z. // American Telephone & Telegraph | |||
| Version 1 (current) | 457 kB | Shaun Ewing | Jul 26, 1932 00:00 | US-1868579-A // Broad-band audio-amplifier // Lane Elmer Z. // American Telephone & Telegraph | ||||
| PDF File 1789416.pdf | 457 kB | Shaun Ewing | Jan 20, 1931 00:00 |
|
US-1789416-A // Neutralized vacuum-tube circuits // Potter Ralph K. // American Telephone & Telegraph | |||
| Version 1 (current) | 457 kB | Shaun Ewing | Jan 20, 1931 00:00 | US-1789416-A // Neutralized vacuum-tube circuits // Potter Ralph K. // American Telephone & Telegraph | ||||
| PDF File 1932606.pdf | 456 kB | Shaun Ewing | Oct 31, 1933 00:00 |
|
US-1932606-A // Gas filled discharge tube control system // Schramm Fred. W. // American Telephone & Telegraph | |||
| Version 1 (current) | 456 kB | Shaun Ewing | Oct 31, 1933 00:00 | US-1932606-A // Gas filled discharge tube control system // Schramm Fred. W. // American Telephone & Telegraph | ||||
| PDF File 1895531.pdf | 456 kB | Shaun Ewing | Jan 31, 1933 00:00 |
|
US-1895531-A // Electrooptical system // Weaver Allan // American Telephone & Telegraph | |||
| Version 1 (current) | 456 kB | Shaun Ewing | Jan 31, 1933 00:00 | US-1895531-A // Electrooptical system // Weaver Allan // American Telephone & Telegraph | ||||
| PDF File 1795389.pdf | 455 kB | Shaun Ewing | Mar 10, 1931 00:00 |
|
US-1795389-A // Selective ringing system // Edwards William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 455 kB | Shaun Ewing | Mar 10, 1931 00:00 | US-1795389-A // Selective ringing system // Edwards William H. // American Telephone & Telegraph | ||||
| PDF File 1951482.pdf | 454 kB | Shaun Ewing | Mar 20, 1934 00:00 |
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US-1951482-A // Alternating current power reserve system // Holden William Henry Towne // American Telephone & Telegraph | |||
| Version 1 (current) | 454 kB | Shaun Ewing | Mar 20, 1934 00:00 | US-1951482-A // Alternating current power reserve system // Holden William Henry Towne // American Telephone & Telegraph | ||||
| PDF File 1799159.pdf | 453 kB | Shaun Ewing | Apr 07, 1931 00:00 |
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US-1799159-A // Multiple-modulation system // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 453 kB | Shaun Ewing | Apr 07, 1931 00:00 | US-1799159-A // Multiple-modulation system // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1842496.pdf | 453 kB | Shaun Ewing | Jan 26, 1932 00:00 |
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US-1842496-A // Mounting for books and the like // Jr. Richard Wagner, // American Telephone & Telegraph | |||
| Version 1 (current) | 453 kB | Shaun Ewing | Jan 26, 1932 00:00 | US-1842496-A // Mounting for books and the like // Jr. Richard Wagner, // American Telephone & Telegraph | ||||
| PDF File 1840434.pdf | 453 kB | Shaun Ewing | Jan 12, 1932 00:00 |
|
US-1840434-A // Conductor system for signaling currents // Cowan Frank A. // American Telephone & Telegraph | |||
| Version 1 (current) | 453 kB | Shaun Ewing | Jan 12, 1932 00:00 | US-1840434-A // Conductor system for signaling currents // Cowan Frank A. // American Telephone & Telegraph | ||||
| PDF File 1880285.pdf | 453 kB | Shaun Ewing | Oct 04, 1932 00:00 |
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US-1880285-A // Wireless system // Scheppmann Wilhelm // American Telephone & Telegraph | |||
| Version 1 (current) | 453 kB | Shaun Ewing | Oct 04, 1932 00:00 | US-1880285-A // Wireless system // Scheppmann Wilhelm // American Telephone & Telegraph | ||||
| PDF File 1854267.pdf | 452 kB | Shaun Ewing | Apr 19, 1932 00:00 |
|
US-1854267-A // Tuning fork generator // Matte Andrew L. // American Telephone & Telegraph | |||
| Version 1 (current) | 452 kB | Shaun Ewing | Apr 19, 1932 00:00 | US-1854267-A // Tuning fork generator // Matte Andrew L. // American Telephone & Telegraph | ||||
| PDF File 1966561.pdf | 451 kB | Shaun Ewing | Jul 17, 1934 00:00 |
|
US-1966561-A // Tent // Jr. James Albert Ratta, // American Telephone & Telegraph | |||
| Version 1 (current) | 451 kB | Shaun Ewing | Jul 17, 1934 00:00 | US-1966561-A // Tent // Jr. James Albert Ratta, // American Telephone & Telegraph | ||||
| PDF File 1814052.pdf | 451 kB | Shaun Ewing | Jul 14, 1931 00:00 |
|
US-1814052-A // Echo suppressor // Mitchell Doren // American Telephone & Telegraph | |||
| Version 1 (current) | 451 kB | Shaun Ewing | Jul 14, 1931 00:00 | US-1814052-A // Echo suppressor // Mitchell Doren // American Telephone & Telegraph | ||||
| PDF File 1862458.pdf | 450 kB | Shaun Ewing | Jun 07, 1932 00:00 |
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US-1862458-A // Measuring apparatus // Barstow John M. // American Telephone & Telegraph | |||
| Version 1 (current) | 450 kB | Shaun Ewing | Jun 07, 1932 00:00 | US-1862458-A // Measuring apparatus // Barstow John M. // American Telephone & Telegraph | ||||
| PDF File 1922116.pdf | 450 kB | Shaun Ewing | Aug 15, 1933 00:00 |
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US-1922116-A // Antenna array // Stone John Stone // American Telephone & Telegraph | |||
| Version 1 (current) | 450 kB | Shaun Ewing | Aug 15, 1933 00:00 | US-1922116-A // Antenna array // Stone John Stone // American Telephone & Telegraph | ||||
| PDF File 1874563.pdf | 450 kB | Shaun Ewing | Aug 30, 1932 00:00 |
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US-1874563-A // System for producing high voltage direct currents // Martin De Loss K. // American Telephone & Telegraph | |||
| Version 1 (current) | 450 kB | Shaun Ewing | Aug 30, 1932 00:00 | US-1874563-A // System for producing high voltage direct currents // Martin De Loss K. // American Telephone & Telegraph | ||||
| PDF File 1793588.pdf | 449 kB | Shaun Ewing | Feb 24, 1931 00:00 |
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US-1793588-A // Measuring and monitoring circuits for telephone lines // Cowan Frank A. // American Telephone & Telegraph | |||
| Version 1 (current) | 449 kB | Shaun Ewing | Feb 24, 1931 00:00 | US-1793588-A // Measuring and monitoring circuits for telephone lines // Cowan Frank A. // American Telephone & Telegraph |
