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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1390545.pdf | 436 kB | Shaun Ewing | Sept 13, 1921 00:00 |
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US-1390545-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Sept 13, 1921 00:00 | US-1390545-A // Desk operator's circuits // Rhodes William A. // American Telephone & Telegraph | ||||
| PDF File 1576566.pdf | 436 kB | Shaun Ewing | Mar 16, 1926 00:00 |
|
US-1576566-A // Duplex balancing arrangement // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 436 kB | Shaun Ewing | Mar 16, 1926 00:00 | US-1576566-A // Duplex balancing arrangement // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1747160.pdf | 434 kB | Shaun Ewing | Feb 18, 1930 00:00 |
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US-1747160-A // Single-side band-carrier system // Carpe Allen // American Telephone & Telegraph | |||
| Version 1 (current) | 434 kB | Shaun Ewing | Feb 18, 1930 00:00 | US-1747160-A // Single-side band-carrier system // Carpe Allen // American Telephone & Telegraph | ||||
| PDF File 1624057.pdf | 434 kB | Shaun Ewing | Apr 12, 1927 00:00 |
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US-1624057-A // Telephone substation circuits // Mckown Frederick W. ; Dietze Eginhard // American Telephone & Telegraph | |||
| Version 1 (current) | 434 kB | Shaun Ewing | Apr 12, 1927 00:00 | US-1624057-A // Telephone substation circuits // Mckown Frederick W. ; Dietze Eginhard // American Telephone & Telegraph | ||||
| PDF File 1632814.pdf | 434 kB | Shaun Ewing | Jun 21, 1927 00:00 |
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US-1632814-A // Filter for periodic electric currents // Zinn Manvel K. // American Telephone & Telegraph | |||
| Version 1 (current) | 434 kB | Shaun Ewing | Jun 21, 1927 00:00 | US-1632814-A // Filter for periodic electric currents // Zinn Manvel K. // American Telephone & Telegraph | ||||
| PDF File 1740621.pdf | 432 kB | Shaun Ewing | Dec 24, 1929 00:00 |
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US-1740621-A // Suppression of echoes and singing in four-wire circuits // Nyquist Harry // American Telephone & Telegraph | |||
| Version 1 (current) | 432 kB | Shaun Ewing | Dec 24, 1929 00:00 | US-1740621-A // Suppression of echoes and singing in four-wire circuits // Nyquist Harry // American Telephone & Telegraph | ||||
| PDF File 1568145.pdf | 432 kB | Shaun Ewing | Jan 05, 1926 00:00 |
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US-1568145-A // Frequency filter for electric currents // Elsasser Henry W. // American Telephone & Telegraph | |||
| Version 1 (current) | 432 kB | Shaun Ewing | Jan 05, 1926 00:00 | US-1568145-A // Frequency filter for electric currents // Elsasser Henry W. // American Telephone & Telegraph | ||||
| PDF File 1662060.pdf | 432 kB | Shaun Ewing | Mar 13, 1928 00:00 |
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US-1662060-A // Relay and circuits therefor // Herman Joseph // American Telephone & Telegraph | |||
| Version 1 (current) | 432 kB | Shaun Ewing | Mar 13, 1928 00:00 | US-1662060-A // Relay and circuits therefor // Herman Joseph // American Telephone & Telegraph | ||||
| PDF File 1594453.pdf | 432 kB | Shaun Ewing | Aug 03, 1926 00:00 |
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US-1594453-A // Transmission circuits // Clark Alva B. ; Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 432 kB | Shaun Ewing | Aug 03, 1926 00:00 | US-1594453-A // Transmission circuits // Clark Alva B. ; Crisson George // American Telephone & Telegraph | ||||
| PDF File 1561524.pdf | 431 kB | Shaun Ewing | Nov 17, 1925 00:00 |
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US-1561524-A // Telephone testing system // Jr. George Sandalls, // American Telephone & Telegraph | |||
| Version 1 (current) | 431 kB | Shaun Ewing | Nov 17, 1925 00:00 | US-1561524-A // Telephone testing system // Jr. George Sandalls, // American Telephone & Telegraph | ||||
| PDF File 1675423.pdf | 431 kB | Shaun Ewing | Jul 03, 1928 00:00 |
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US-1675423-A // Telephone substation circuits // Ohl Russell S. // American Telephone & Telegraph | |||
| Version 1 (current) | 431 kB | Shaun Ewing | Jul 03, 1928 00:00 | US-1675423-A // Telephone substation circuits // Ohl Russell S. // American Telephone & Telegraph | ||||
| PDF File 1547242.pdf | 430 kB | Shaun Ewing | Jul 28, 1925 00:00 |
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US-1547242-A // Carrier transmission over power circuits // Strieby Maurice E. // American Telephone & Telegraph | |||
| Version 1 (current) | 430 kB | Shaun Ewing | Jul 28, 1925 00:00 | US-1547242-A // Carrier transmission over power circuits // Strieby Maurice E. // American Telephone & Telegraph | ||||
| PDF File 1544737.pdf | 430 kB | Shaun Ewing | Jul 07, 1925 00:00 |
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US-1544737-A // Elimination of interference in carrier systems // Green Estill I. // American Telephone & Telegraph | |||
| Version 1 (current) | 430 kB | Shaun Ewing | Jul 07, 1925 00:00 | US-1544737-A // Elimination of interference in carrier systems // Green Estill I. // American Telephone & Telegraph | ||||
| PDF File 1550684.pdf | 430 kB | Shaun Ewing | Aug 25, 1925 00:00 |
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US-1550684-A // Prevention of overloading in speech circuits // Espenschied Lloyd // American Telephone & Telegraph | |||
| Version 1 (current) | 430 kB | Shaun Ewing | Aug 25, 1925 00:00 | US-1550684-A // Prevention of overloading in speech circuits // Espenschied Lloyd // American Telephone & Telegraph | ||||
| PDF File 1636054.pdf | 429 kB | Shaun Ewing | Jul 19, 1927 00:00 |
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US-1636054-A // Electrical discharge device // Holden William H. T. // American Telephone & Telegraph | |||
| Version 1 (current) | 429 kB | Shaun Ewing | Jul 19, 1927 00:00 | US-1636054-A // Electrical discharge device // Holden William H. T. // American Telephone & Telegraph | ||||
| PDF File 1688452.pdf | 429 kB | Shaun Ewing | Oct 23, 1928 00:00 |
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US-1688452-A // Telephone signaling system // Demarest Charles S. ; Loynes Owen H. // American Telephone & Telegraph | |||
| Version 1 (current) | 429 kB | Shaun Ewing | Oct 23, 1928 00:00 | US-1688452-A // Telephone signaling system // Demarest Charles S. ; Loynes Owen H. // American Telephone & Telegraph | ||||
| PDF File 1715415.pdf | 429 kB | Shaun Ewing | Jun 04, 1929 00:00 |
|
US-1715415-A // Volume-control system // Hanson Oscar B. ; Crisson George ; Mckown Frederick W. // American Telephone & Telegraph | |||
| Version 1 (current) | 429 kB | Shaun Ewing | Jun 04, 1929 00:00 | US-1715415-A // Volume-control system // Hanson Oscar B. ; Crisson George ; Mckown Frederick W. // American Telephone & Telegraph | ||||
| PDF File 1762212.pdf | 429 kB | Shaun Ewing | Jun 10, 1930 00:00 |
|
US-1762212-A // Thermionic vacuum tube // Jr. Charles W. Carter, // American Telephone & Telegraph | |||
| Version 1 (current) | 429 kB | Shaun Ewing | Jun 10, 1930 00:00 | US-1762212-A // Thermionic vacuum tube // Jr. Charles W. Carter, // American Telephone & Telegraph | ||||
| PDF File 1574779.pdf | 428 kB | Shaun Ewing | Mar 02, 1926 00:00 |
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US-1574779-A // Translating circuits // Affel Herman A. // American Telephone & Telegraph | |||
| Version 1 (current) | 428 kB | Shaun Ewing | Mar 02, 1926 00:00 | US-1574779-A // Translating circuits // Affel Herman A. // American Telephone & Telegraph | ||||
| PDF File 1565540.pdf | 427 kB | Shaun Ewing | Dec 15, 1925 00:00 |
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US-1565540-A // Automatic volume regulation of transmission systems // Wright Sumner B. // American Telephone & Telegraph | |||
| Version 1 (current) | 427 kB | Shaun Ewing | Dec 15, 1925 00:00 | US-1565540-A // Automatic volume regulation of transmission systems // Wright Sumner B. // American Telephone & Telegraph |
