H04Q 2213/216
Code signals
Official title: Code signals; Framing (not synchronizing)
H04Q2213/216 (Code signals) appears on 36 US grants and 1 published applications in this corpus.
Search patents in H04Q- Granted patents
- 36
- Published applications
- 1
- Assignees
- 22
- Inventors
- 75
- Latest grant
- 19 Sep 2006
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Facsimile system19 Sep 2006US 7,110,134 B2Canon Kabushiki Kaisha
- Facsimile system19 Aug 2003US 6,608,696 B1Canon Kabushiki Kaisha
- Facsimile system5 Dec 2000US 6,157,463 ACanon Kabushiki Kaisha
- ISDN-based high speed communication system3 Nov 1998US 5,832,240 A
- Digital telephone switching system having plural terminal devices directly connected to a common digital line17 Feb 1998US 5,719,855 AHitachi Telecom Technologies, Ltd.
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
- Called equipment selection method in ISDN packet switching mode and packet switching system for digital network81US 5,459,721 ANEC Corporation · 1995
- Automatic detection of digital call paths in a telephone system49US 5,528,679 APrimary Access Corporation · 1996
- Communication system for converting ISDN signaling protocol between local and public network having first group of mandatory elements and second group of non-mandatory elements44US 5,278,972 AAT&T Bell Laboratories · 1994
- ISDN, basic rate interface arranged for quad voice41US 4,970,723 AAT&T Bell Laboratories · 1990