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Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 1819069.pdf | 494 kB | Shaun Ewing | Aug 18, 1931 00:00 |
|
US-1819069-A // Static frequency changer // Bonell Ralph K. // American Telephone & Telegraph | |||
| Version 1 (current) | 494 kB | Shaun Ewing | Aug 18, 1931 00:00 | US-1819069-A // Static frequency changer // Bonell Ralph K. // American Telephone & Telegraph | ||||
| PDF File 1819083.pdf | 280 kB | Shaun Ewing | Aug 18, 1931 00:00 |
|
US-1819083-A // Phonograph reproducer // Edwards William H. // American Telephone & Telegraph | |||
| Version 1 (current) | 280 kB | Shaun Ewing | Aug 18, 1931 00:00 | US-1819083-A // Phonograph reproducer // Edwards William H. // American Telephone & Telegraph | ||||
| PDF File 1820088.pdf | 584 kB | Shaun Ewing | Aug 25, 1931 00:00 |
|
US-1820088-A // Recording apparatus // Parker Ralzemond D. ; Best Fred H. // American Telephone & Telegraph | |||
| Version 1 (current) | 584 kB | Shaun Ewing | Aug 25, 1931 00:00 | US-1820088-A // Recording apparatus // Parker Ralzemond D. ; Best Fred H. // American Telephone & Telegraph | ||||
| PDF File 1820094.pdf | 697 kB | Shaun Ewing | Aug 25, 1931 00:00 |
|
US-1820094-A // Winch rope winder // Smith Temple C. ; Spowart John B. ; Fitzpatrick Paul G. // American Telephone & Telegraph | |||
| Version 1 (current) | 697 kB | Shaun Ewing | Aug 25, 1931 00:00 | US-1820094-A // Winch rope winder // Smith Temple C. ; Spowart John B. ; Fitzpatrick Paul G. // American Telephone & Telegraph | ||||
| PDF File 1820116.pdf | 580 kB | Shaun Ewing | Aug 25, 1931 00:00 |
|
US-1820116-A // Testing system // Burns Roy W. // American Telephone & Telegraph | |||
| Version 1 (current) | 580 kB | Shaun Ewing | Aug 25, 1931 00:00 | US-1820116-A // Testing system // Burns Roy W. // American Telephone & Telegraph | ||||
| PDF File 1821004.pdf | 353 kB | Shaun Ewing | Sept 01, 1931 00:00 |
|
US-1821004-A // Compression of frequency range // Carpe Allen // American Telephone & Telegraph | |||
| Version 1 (current) | 353 kB | Shaun Ewing | Sept 01, 1931 00:00 | US-1821004-A // Compression of frequency range // Carpe Allen // American Telephone & Telegraph | ||||
| PDF File 1821005.pdf | 356 kB | Shaun Ewing | Sept 01, 1931 00:00 |
|
US-1821005-A // Gain measuring apparatus // Cowan Frank A. // American Telephone & Telegraph | |||
| Version 1 (current) | 356 kB | Shaun Ewing | Sept 01, 1931 00:00 | US-1821005-A // Gain measuring apparatus // Cowan Frank A. // American Telephone & Telegraph | ||||
| PDF File 1821006.pdf | 322 kB | Shaun Ewing | Sept 01, 1931 00:00 |
|
US-1821006-A // Measurement of negative resistance // Crisson George // American Telephone & Telegraph | |||
| Version 1 (current) | 322 kB | Shaun Ewing | Sept 01, 1931 00:00 | US-1821006-A // Measurement of negative resistance // Crisson George // American Telephone & Telegraph | ||||
| PDF File 1821279.pdf | 374 kB | Shaun Ewing | Sept 01, 1931 00:00 |
|
US-1821279-A // Bookholder // Sithens Edward J. // American Telephone & Telegraph | |||
| Version 1 (current) | 374 kB | Shaun Ewing | Sept 01, 1931 00:00 | US-1821279-A // Bookholder // Sithens Edward J. // American Telephone & Telegraph | ||||
| PDF File 1821928.pdf | 316 kB | Shaun Ewing | Sept 08, 1931 00:00 |
|
US-1821928-A // Telephone echo suppressor // Clark Alva B. // American Telephone & Telegraph | |||
| Version 1 (current) | 316 kB | Shaun Ewing | Sept 08, 1931 00:00 | US-1821928-A // Telephone echo suppressor // Clark Alva B. // American Telephone & Telegraph | ||||
| PDF File 1821993.pdf | 417 kB | Shaun Ewing | Sept 08, 1931 00:00 |
|
US-1821993-A // Telephone system // Tradup Albert // American Telephone & Telegraph | |||
| Version 1 (current) | 417 kB | Shaun Ewing | Sept 08, 1931 00:00 | US-1821993-A // Telephone system // Tradup Albert // American Telephone & Telegraph | ||||
| PDF File 1821997.pdf | 498 kB | Shaun Ewing | Sept 08, 1931 00:00 |
|
US-1821997-A // Compression of frequency range // Wintringham William T. // American Telephone & Telegraph | |||
| Version 1 (current) | 498 kB | Shaun Ewing | Sept 08, 1931 00:00 | US-1821997-A // Compression of frequency range // Wintringham William T. // American Telephone & Telegraph | ||||
| PDF File 1823944.pdf | 707 kB | Shaun Ewing | Sept 22, 1931 00:00 |
|
US-1823944-A // Time recording // Kittredge Linus E. ; Dorff Louis A. // American Telephone & Telegraph | |||
| Version 1 (current) | 707 kB | Shaun Ewing | Sept 22, 1931 00:00 | US-1823944-A // Time recording // Kittredge Linus E. ; Dorff Louis A. // American Telephone & Telegraph | ||||
| PDF File 1823948.pdf | 1.47 MB | Shaun Ewing | Sept 22, 1931 00:00 |
|
US-1823948-A // Radio telephone and telegraph system // Mccann Thomas A. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.47 MB | Shaun Ewing | Sept 22, 1931 00:00 | US-1823948-A // Radio telephone and telegraph system // Mccann Thomas A. // American Telephone & Telegraph | ||||
| PDF File 1824801.pdf | 734 kB | Shaun Ewing | Sept 29, 1931 00:00 |
|
US-1824801-A // Electrical potentiometer // Bouton Lewis L. // American Telephone & Telegraph | |||
| Version 1 (current) | 734 kB | Shaun Ewing | Sept 29, 1931 00:00 | US-1824801-A // Electrical potentiometer // Bouton Lewis L. // American Telephone & Telegraph | ||||
| PDF File 1824802.pdf | 321 kB | Shaun Ewing | Sept 29, 1931 00:00 |
|
US-1824802-A // Insulation testing system // Brehman Luther W. // American Telephone & Telegraph | |||
| Version 1 (current) | 321 kB | Shaun Ewing | Sept 29, 1931 00:00 | US-1824802-A // Insulation testing system // Brehman Luther W. // American Telephone & Telegraph | ||||
| PDF File 1824827.pdf | 475 kB | Shaun Ewing | Sept 29, 1931 00:00 |
|
US-1824827-A // Radio signaling system // Martin De Loss K. // American Telephone & Telegraph | |||
| Version 1 (current) | 475 kB | Shaun Ewing | Sept 29, 1931 00:00 | US-1824827-A // Radio signaling system // Martin De Loss K. // American Telephone & Telegraph | ||||
| PDF File 1824829.pdf | 437 kB | Shaun Ewing | Sept 29, 1931 00:00 |
|
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 1825715.pdf | 526 kB | Shaun Ewing | Oct 06, 1931 00:00 |
|
US-1825715-A // Telegraph transmission measuring system // Cory Samuel I. // American Telephone & Telegraph | |||
| Version 1 (current) | 526 kB | Shaun Ewing | Oct 06, 1931 00:00 | US-1825715-A // Telegraph transmission measuring system // Cory Samuel I. // American Telephone & Telegraph | ||||
| PDF File 1825723.pdf | 775 kB | Shaun Ewing | Oct 06, 1931 00:00 |
|
US-1825723-A // Telephone system // Friend Otto A. ; Heitsmith William J. // American Telephone & Telegraph | |||
| Version 1 (current) | 775 kB | Shaun Ewing | Oct 06, 1931 00:00 | US-1825723-A // Telephone system // Friend Otto A. ; Heitsmith William J. // American Telephone & Telegraph |
