H04Q 2213/298
Loop or ring system
H04Q2213/298 (Loop or ring system) appears on 9 US grants and 0 published applications in this corpus.
Search patents in H04Q- Granted patents
- 9
- Published applications
- 0
- Assignees
- 7
- Inventors
- 17
- Latest grant
- 24 Jun 2003
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Control of the change of telecommunications channels in a DECT-specific RLL/WLL partial system bound to an ISDN-system24 Jun 2003US 6,584,114 B1Siemens Aktiengesellschaft
- Cellular cordless telecommunications system1 May 2001US 6,226,515 B1Siemens Aktiengesellschaft
- Assigning channels of different capacities in a hybrid ISDN-DECT telecommunications system16 Jan 2001US 6,175,738 B1Siemens Aktiengesellschaft
- Distinctive ringing and distinctive call-waiting tones in an ISDN14 Sep 1999US 5,953,407 ANortel Networks Limited
- Circuit arrangement for integration of EDP systems in the utilization of telephone systems20 May 1997US 5,631,953 ACSB-System Software -Entwicklung & Unternehmungsberatung GmbH
No published applications in this class yet.
Most cited
By later US patents
- ISDN-to-ISDN communication via satellite microwave radio frequency communications link164US 5,412,660 ATrimble Navigation Limited · 1995
- Cellular cordless telecommunications system111US 6,226,515 B1Siemens Aktiengesellschaft · 2001
- ISDN terminal adapter with teleconference provision79US 4,998,243 ARacal Data Communications Inc. · 1991
- Circuit arrangement for integration of EDP systems in the utilization of telephone systems16US 5,631,953 ACSB-System Software -Entwicklung & Unternehmungsberatung GmbH · 1997
- Radio communication apparatus for ISDN14US 5,357,558 ASony Corporation · 1994