Unable to load page tree. It seems that you do not have permission to view the root page.
Attachments
| Name | Size | Creator | Creation Date | Labels | Comment | |||
|---|---|---|---|---|---|---|---|---|
| PDF File 2820105.pdf | 334 kB | Shaun Ewing | Jan 14, 1958 00:00 |
|
US-2820105-A // Telephone conference circuit // Swan Luther L. // American Telephone & Telegraph | |||
| Version 1 (current) | 334 kB | Shaun Ewing | Jan 14, 1958 00:00 | US-2820105-A // Telephone conference circuit // Swan Luther L. // American Telephone & Telegraph | ||||
| PDF File 2826637.pdf | 342 kB | Shaun Ewing | Mar 11, 1958 00:00 |
|
US-2826637-A // Automatic level equalizer // Macadam Walter K. // American Telephone & Telegraph | |||
| Version 1 (current) | 342 kB | Shaun Ewing | Mar 11, 1958 00:00 | US-2826637-A // Automatic level equalizer // Macadam Walter K. // American Telephone & Telegraph | ||||
| PDF File 2831106.pdf | 451 kB | Shaun Ewing | Apr 15, 1958 00:00 |
|
US-2831106-A // Stabilized automatic frequency control circuit with noise operated squelch // Clark Jean H. // American Telephone & Telegraph | |||
| Version 1 (current) | 451 kB | Shaun Ewing | Apr 15, 1958 00:00 | US-2831106-A // Stabilized automatic frequency control circuit with noise operated squelch // Clark Jean H. // American Telephone & Telegraph | ||||
| PDF File 2843682.pdf | 851 kB | Shaun Ewing | Jul 15, 1958 00:00 |
|
US-2843682-A // Program transmission reversible network // Jr. John Schretzmayer, // American Telephone & Telegraph | |||
| Version 1 (current) | 851 kB | Shaun Ewing | Jul 15, 1958 00:00 | US-2843682-A // Program transmission reversible network // Jr. John Schretzmayer, // American Telephone & Telegraph | ||||
| PDF File 2845478.pdf | 941 kB | Shaun Ewing | Jul 29, 1958 00:00 |
|
US-2845478-A // Selective station calling system // Foley Daniel Elmore // American Telephone & Telegraph | |||
| Version 1 (current) | 941 kB | Shaun Ewing | Jul 29, 1958 00:00 | US-2845478-A // Selective station calling system // Foley Daniel Elmore // American Telephone & Telegraph | ||||
| PDF File 2861136.pdf | 360 kB | Shaun Ewing | Nov 18, 1958 00:00 |
|
US-2861136-A // Switch mechanism for telephone apparatus // Brison Jordan W. // American Telephone & Telegraph | |||
| Version 1 (current) | 360 kB | Shaun Ewing | Nov 18, 1958 00:00 | US-2861136-A // Switch mechanism for telephone apparatus // Brison Jordan W. // American Telephone & Telegraph | ||||
| PDF File 2863950.pdf | 5.14 MB | Shaun Ewing | Dec 09, 1958 00:00 |
|
US-2863950-A // Telephone service concentrator // Dunning Sanford F. ; Macpherson Donald H. // American Telephone & Telegraph ; Bell Telephone Labor Inc | |||
| Version 1 (current) | 5.14 MB | Shaun Ewing | Dec 09, 1958 00:00 | US-2863950-A // Telephone service concentrator // Dunning Sanford F. ; Macpherson Donald H. // American Telephone & Telegraph ; Bell Telephone Labor Inc | ||||
| PDF File 2866005.pdf | 638 kB | Shaun Ewing | Dec 23, 1958 00:00 |
|
US-2866005-A // Make-busy circuit for trunks in unattended dial office // Kupferle Arthur T. // American Telephone & Telegraph | |||
| Version 1 (current) | 638 kB | Shaun Ewing | Dec 23, 1958 00:00 | US-2866005-A // Make-busy circuit for trunks in unattended dial office // Kupferle Arthur T. // American Telephone & Telegraph | ||||
| PDF File 2869015.pdf | 394 kB | Shaun Ewing | Jan 13, 1959 00:00 |
|
US-2869015-A // Method of fabricating a grid electrode // Bolz Alfred R. // American Telephone & Telegraph | |||
| Version 1 (current) | 394 kB | Shaun Ewing | Jan 13, 1959 00:00 | US-2869015-A // Method of fabricating a grid electrode // Bolz Alfred R. // American Telephone & Telegraph | ||||
| PDF File 2878306.pdf | 494 kB | Shaun Ewing | Mar 17, 1959 00:00 |
|
US-2878306-A // Teletypewriter testing system // Smith William R. // American Telephone & Telegraph | |||
| Version 1 (current) | 494 kB | Shaun Ewing | Mar 17, 1959 00:00 | US-2878306-A // Teletypewriter testing system // Smith William R. // American Telephone & Telegraph | ||||
| PDF File 2886396.pdf | 533 kB | Shaun Ewing | May 12, 1959 00:00 |
|
US-2886396-A // Drawer for storage of keys // Anthony Harry E. ; Burnham Charles S. ; Ment Jack R. De ; Hahn George W. ; Jr. John M. Hepler, // American Telephone & Telegraph | |||
| Version 1 (current) | 533 kB | Shaun Ewing | May 12, 1959 00:00 | US-2886396-A // Drawer for storage of keys // Anthony Harry E. ; Burnham Charles S. ; Ment Jack R. De ; Hahn George W. ; Jr. John M. Hepler, // American Telephone & Telegraph | ||||
| PDF File 2891117.pdf | 340 kB | Shaun Ewing | Jun 16, 1959 00:00 |
|
US-2891117-A // Wave translating system // Coleman Sidney B. // American Telephone & Telegraph | |||
| Version 1 (current) | 340 kB | Shaun Ewing | Jun 16, 1959 00:00 | US-2891117-A // Wave translating system // Coleman Sidney B. // American Telephone & Telegraph | ||||
| PDF File 2892888.pdf | 1.47 MB | Shaun Ewing | Jun 30, 1959 00:00 |
|
US-2892888-A // Digital system with error elimination // James Richard T. ; Ruppel Alfred E. // American Telephone & Telegraph ; Bell Telephone Labor Inc | |||
| Version 1 (current) | 1.47 MB | Shaun Ewing | Jun 30, 1959 00:00 | US-2892888-A // Digital system with error elimination // James Richard T. ; Ruppel Alfred E. // American Telephone & Telegraph ; Bell Telephone Labor Inc | ||||
| PDF File 2896020.pdf | 1.95 MB | Shaun Ewing | Jul 21, 1959 00:00 |
|
US-2896020-A // Multiple transmitter control circuit // Goodman Charles J. ; Walker Charles R. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.95 MB | Shaun Ewing | Jul 21, 1959 00:00 | US-2896020-A // Multiple transmitter control circuit // Goodman Charles J. ; Walker Charles R. // American Telephone & Telegraph | ||||
| PDF File 2901542.pdf | 1.71 MB | Shaun Ewing | Aug 25, 1959 00:00 |
|
US-2901542-A // "wake up" or "morning call" system for automatically signaling private branch exchange extension stations // Henches Eugene W. ; Sheldon Ivan R. // American Telephone & Telegraph | |||
| Version 1 (current) | 1.71 MB | Shaun Ewing | Aug 25, 1959 00:00 | US-2901542-A // "wake up" or "morning call" system for automatically signaling private branch exchange extension stations // Henches Eugene W. ; Sheldon Ivan R. // American Telephone & Telegraph | ||||
| PDF File 2901544.pdf | 767 kB | Shaun Ewing | Aug 25, 1959 00:00 |
|
US-2901544-A // Four-party station identification circuit // Collins John J. // American Telephone & Telegraph | |||
| Version 1 (current) | 767 kB | Shaun Ewing | Aug 25, 1959 00:00 | US-2901544-A // Four-party station identification circuit // Collins John J. // American Telephone & Telegraph | ||||
| PDF File 2908382.pdf | 648 kB | Shaun Ewing | Oct 13, 1959 00:00 |
|
US-2908382-A // Display carrying unit for color telephone sets // Turner Henry G. // American Telephone & Telegraph | |||
| Version 1 (current) | 648 kB | Shaun Ewing | Oct 13, 1959 00:00 | US-2908382-A // Display carrying unit for color telephone sets // Turner Henry G. // American Telephone & Telegraph | ||||
| PDF File 2909775.pdf | 203 kB | Shaun Ewing | Oct 20, 1959 00:00 |
|
US-2909775-A // Antenna // Barnes Richard R. // American Telephone & Telegraph | |||
| Version 1 (current) | 203 kB | Shaun Ewing | Oct 20, 1959 00:00 | US-2909775-A // Antenna // Barnes Richard R. // American Telephone & Telegraph | ||||
| PDF File 2913526.pdf | 568 kB | Shaun Ewing | Nov 17, 1959 00:00 |
|
US-2913526-A // Calling station identification circuit // Smits John M. ; Sturtevant Michael J. // American Telephone & Telegraph | |||
| Version 1 (current) | 568 kB | Shaun Ewing | Nov 17, 1959 00:00 | US-2913526-A // Calling station identification circuit // Smits John M. ; Sturtevant Michael J. // American Telephone & Telegraph | ||||
| PDF File 2921116.pdf | 966 kB | Shaun Ewing | Jan 12, 1960 00:00 |
|
US-2921116-A // Teletypewriter automatic alarm reporting system // Makary William E. // American Telephone & Telegraph | |||
| Version 1 (current) | 966 kB | Shaun Ewing | Jan 12, 1960 00:00 | US-2921116-A // Teletypewriter automatic alarm reporting system // Makary William E. // American Telephone & Telegraph |
