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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1871916.pdf | 448 kB | Shaun Ewing | Aug 16, 1932 00:00 |
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US-1871916-A // Signal monitoring device // Pierce Ralph E. // American Telephone & Telegraph | |||
| Version 1 (current) | 448 kB | Shaun Ewing | Aug 16, 1932 00:00 | US-1871916-A // Signal monitoring device // Pierce Ralph E. // American Telephone & Telegraph | ||||
| PDF File 1943478.pdf | 447 kB | Shaun Ewing | Jan 16, 1934 00:00 |
|
US-1943478-A // Transmission level control in telegraph signaling systems // Herman Joseph // American Telephone & Telegraph | |||
| Version 1 (current) | 447 kB | Shaun Ewing | Jan 16, 1934 00:00 | US-1943478-A // Transmission level control in telegraph signaling systems // Herman Joseph // American Telephone & Telegraph | ||||
| PDF File 1860459.pdf | 446 kB | Shaun Ewing | May 31, 1932 00:00 |
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US-1860459-A // Signaling arrangement for two party telephone lines // Edwards William Hopple // American Telephone & Telegraph | |||
| Version 1 (current) | 446 kB | Shaun Ewing | May 31, 1932 00:00 | US-1860459-A // Signaling arrangement for two party telephone lines // Edwards William Hopple // 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 1859390.pdf | 445 kB | Shaun Ewing | May 24, 1932 00:00 |
|
US-1859390-A // Concentric conductor system // Green Estill I. // American Telephone & Telegraph | |||
| Version 1 (current) | 445 kB | Shaun Ewing | May 24, 1932 00:00 | US-1859390-A // Concentric conductor system // Green Estill I. // 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 1818064.pdf | 441 kB | Shaun Ewing | Aug 11, 1931 00:00 |
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US-1818064-A // Telephone system // Johnson Herbert B. ; Nostitz Erich Von // Bell Telephone Labor Inc ; American Telephone & Telegraph | |||
| Version 1 (current) | 441 kB | Shaun Ewing | Aug 11, 1931 00:00 | US-1818064-A // Telephone system // Johnson Herbert B. ; Nostitz Erich Von // Bell Telephone Labor Inc ; American Telephone & Telegraph | ||||
| PDF File 2224275.pdf | 441 kB | Shaun Ewing | Dec 10, 1940 00:00 |
|
US-2224275-A // Apparatus for producing a current // Rougvie James Ferguson // American Telephone & Telegraph | |||
| Version 1 (current) | 441 kB | Shaun Ewing | Dec 10, 1940 00:00 | US-2224275-A // Apparatus for producing a current // Rougvie James Ferguson // American Telephone & Telegraph | ||||
| PDF File 1929568.pdf | 441 kB | Shaun Ewing | Oct 10, 1933 00:00 |
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US-1929568-A // Reel // Spowart John B. // American Telephone & Telegraph | |||
| Version 1 (current) | 441 kB | Shaun Ewing | Oct 10, 1933 00:00 | US-1929568-A // Reel // Spowart John B. // American Telephone & Telegraph | ||||
| PDF File 1894335.pdf | 439 kB | Shaun Ewing | Jan 17, 1933 00:00 |
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US-1894335-A // Phantom telephone circuit // Zinn Manvel K. // American Telephone & Telegraph | |||
| Version 1 (current) | 439 kB | Shaun Ewing | Jan 17, 1933 00:00 | US-1894335-A // Phantom telephone circuit // Zinn Manvel K. // American Telephone & Telegraph | ||||
| PDF File 1787552.pdf | 439 kB | Shaun Ewing | Jan 06, 1931 00:00 |
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US-1787552-A // Filing cabinet // Rice John S. // American Telephone & Telegraph | |||
| Version 1 (current) | 439 kB | Shaun Ewing | Jan 06, 1931 00:00 | US-1787552-A // Filing cabinet // Rice John S. // American Telephone & Telegraph | ||||
| PDF File 1983586.pdf | 438 kB | Shaun Ewing | Dec 11, 1934 00:00 |
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US-1983586-A // Paper feed mechanism // Watson Edward F. ; Mccann Thomas A. // American Telephone & Telegraph | |||
| Version 1 (current) | 438 kB | Shaun Ewing | Dec 11, 1934 00:00 | US-1983586-A // Paper feed mechanism // Watson Edward F. ; Mccann Thomas A. // American Telephone & Telegraph | ||||
| PDF File 1824829.pdf | 437 kB | Shaun Ewing | Sept 29, 1931 00:00 |
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US-1824829-A // Cable testing system // Mccurdy Ralph G. // American Telephone & Telegraph | |||
| Version 1 (current) | 437 kB | Shaun Ewing | Sept 29, 1931 00:00 | US-1824829-A // Cable testing system // Mccurdy Ralph G. // American Telephone & Telegraph | ||||
| PDF File 1798202.pdf | 436 kB | Shaun Ewing | Mar 31, 1931 00:00 |
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US-1798202-A // Relay arrangement for use with voice-operated devices // Herman Joseph // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Mar 31, 1931 00:00 | US-1798202-A // Relay arrangement for use with voice-operated devices // Herman Joseph // American Telephone & Telegraph | ||||
| PDF File 1882125.pdf | 436 kB | Shaun Ewing | Oct 11, 1932 00:00 |
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US-1882125-A // Testing system // Edwards Paul G. // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Oct 11, 1932 00:00 | US-1882125-A // Testing system // Edwards Paul G. // American Telephone & Telegraph | ||||
| PDF File 2030971.pdf | 436 kB | Shaun Ewing | Feb 18, 1936 00:00 |
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US-2030971-A // Operator's telephone circuit // Dietze Eginhard // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Feb 18, 1936 00:00 | US-2030971-A // Operator's telephone circuit // Dietze Eginhard // American Telephone & Telegraph | ||||
| PDF File 1968164.pdf | 436 kB | Shaun Ewing | Jul 31, 1934 00:00 |
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US-1968164-A // System for measuring transmission losses at various frequencies // Nyquist Harry // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Jul 31, 1934 00:00 | US-1968164-A // System for measuring transmission losses at various frequencies // Nyquist Harry // American Telephone & Telegraph | ||||
| PDF File 1860457.pdf | 436 kB | Shaun Ewing | May 31, 1932 00:00 |
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US-1860457-A // Signaling system for party telephone lines // Edwards William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | May 31, 1932 00:00 | US-1860457-A // Signaling system for party telephone lines // Edwards William H. // American Telephone & Telegraph | ||||
| PDF File 1792523.pdf | 435 kB | Shaun Ewing | Feb 17, 1931 00:00 |
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US-1792523-A // Phase-shifting network // Zobel Otto J. // American Telephone & Telegraph | |||
| Version 1 (current) | 435 kB | Shaun Ewing | Feb 17, 1931 00:00 | US-1792523-A // Phase-shifting network // Zobel Otto J. // American Telephone & Telegraph | ||||
| PDF File 1871986.pdf | 434 kB | Shaun Ewing | Aug 16, 1932 00:00 |
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US-1871986-A // Method and means for reducing distortion of vacuum tube amplifiers // Hamilton Harold S. // American Telephone & Telegraph | |||
| Version 1 (current) | 434 kB | Shaun Ewing | Aug 16, 1932 00:00 | US-1871986-A // Method and means for reducing distortion of vacuum tube amplifiers // Hamilton Harold S. // American Telephone & Telegraph |
