H04Q 2213/206
User-to-user signalling
H04Q2213/206 (User-to-user signalling) appears on 12 US grants and 0 published applications in this corpus.
Search patents in H04Q- Granted patents
- 12
- Published applications
- 0
- Assignees
- 9
- Inventors
- 20
- Latest grant
- 28 Dec 1999
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Automatic call back under control of a telephone terminal28 Dec 1999US 6,009,157 ALucent Technologies Inc.
- Method for sending out absent messages from ISDN exchange system10 Aug 1999US 5,937,039 ASamsung Electronics Co., Ltd.
- Facsimile apparatus employing user-to-user information on an ISDN10 Dec 1996US 5,583,658 ACanon Kabushiki Kaisha
- Data management method and system thereof22 Oct 1996US 5,568,551 ASony Corporation
- Automatic detection of digital call paths in a telephone system18 Jun 1996US 5,528,679 APrimary Access Corporation
No published applications in this class yet.
Most cited
By later US patents
- System and method for performing interlocution at a plurality of terminals connected to communication network121US 5,280,583 AHitachi, Ltd. · 1994
- Automatic detection of digital call paths in a telephone system49US 5,528,679 APrimary Access Corporation · 1996
- Semi-automated operator assistance telecommunication calls44US 5,046,183 AAT&T Bell Laboratories · 1991
- Data terminal equipment and data transmission control method40US 5,012,470 ARicoh Company, Ltd. · 1991
- Time and charges information delivery for operator assistance telecommunication calls28US 5,043,983 AAT&T Bell Laboratories · 1991