H04Q 2213/176
Common channel signalling
H04Q2213/176 (Common channel signalling) appears on 14 US grants and 0 published applications in this corpus.
Search patents in H04Q- Granted patents
- 14
- Published applications
- 0
- Assignees
- 11
- Inventors
- 27
- Latest grant
- 14 Sep 1999
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Distinctive ringing and distinctive call-waiting tones in an ISDN14 Sep 1999US 5,953,407 ANortel Networks Limited
- Digital telephone switching system having plural terminal devices directly connected to a common digital line17 Feb 1998US 5,719,855 AHitachi Telecom Technologies, Ltd.
- Bus line traffic control adapter apparatus16 Sep 1997US 5,668,799 ANEC Corporation
- Information display provided to calling party4 Mar 1997US 5,608,788 ALucent Technologies Inc.
- Method and apparatus for masking the reporting of network telephony events to a computer3 Dec 1996US 5,581,608 ARolm Systems
No published applications in this class yet.
Most cited
By later US patents
- Method and apparatus for masking the reporting of network telephony events to a computer238US 5,581,608 ARolm Systems · 1996
- Information display provided to calling party125US 5,608,788 ALucent Technologies Inc. · 1997
- Semi-automated operator assistance telecommunication calls44US 5,046,183 AAT&T Bell Laboratories · 1991
- Method of activating tandem digital subscriber lines29US 5,243,593 AAlcatel Network Systems, Inc. · 1993
- Time and charges information delivery for operator assistance telecommunication calls28US 5,043,983 AAT&T Bell Laboratories · 1991