| Application number | Title of the application | Filing Date | Status |
|---|
| 07/671526 | ATM CELL BROADCASTING SYSTEM | Mar 18, 1991 | Abandoned |
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| 07/640477 | ADAPTIVE ACOUSTIC ECHO CANCELLER | Jan 10, 1991 | Abandoned |
| 07/637016 | ADAPTIVE ACOSUTIC ECHO CANCELLER | Jan 3, 1991 | Abandoned |
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