American Telephone and Telegraph Company; AT&T Information Systems
Patent Applications and Registrations
Patent applications and USPTO patent grants for American Telephone and Telegraph Company; AT&T Information Systems.The latest application filed is for "fast packetized data delivery for digital networks".
- American Telephone and Telegraph Company; AT&T Information Systems - Holmdel NJ
| Patent | Date |
|---|---|
| Fast packetized data delivery for digital networks Grant 4,894,822 - Buhrke , et al. January 16, 1 | 1990-01-16 |
| Telephone call screening apparatus Grant 4,827,501 - Hansen May 2, 1 | 1989-05-02 |
| Battery feed circuit for a telephone system Grant 4,813,066 - Holtz , et al. March 14, 1 | 1989-03-14 |
| Power transfer circuit including a sympathetic resonator Grant 4,802,080 - Bossi , et al. January 31, 1 | 1989-01-31 |
| Communication facilities access control arrangement Grant 4,799,255 - Billinger , et al. January 17, 1 | 1989-01-17 |
| Inter-exchange carrier access selection feature for a PBX user Grant 4,791,665 - Bogart , et al. December 13, 1 | 1988-12-13 |
| Implied principal busy status indicator for covered calls Grant 4,790,004 - Nalbone December 6, 1 | 1988-12-06 |
| Message service system network Grant 4,790,003 - Kepley , et al. De | 1988-12-06 |
| Database management system with active data dictionary Grant 4,774,661 - Kumpati September 27, 1 | 1988-09-27 |
| Inter-exchange carrier access Grant 4,769,834 - Billinger , et al. September 6, 1 | 1988-09-06 |
| Telephone stand Grant D297,325 - Engstrom , et al. * August 23, 1 | 1988-08-23 |
| Integrated calling directory Grant 4,734,931 - Bourg , et al. March 29, 1 | 1988-03-29 |
| Combined circuit and packet switching system Grant 4,698,802 - Goke , et al. October 6, 1 | 1987-10-06 |
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