H04Q 2213/297
Coupling circuits between different tdm systems
Official title: Coupling circuits between different (rate) TDM systems
H04Q2213/297 (Coupling circuits between different tdm systems) appears on 21 US grants and 0 published applications in this corpus.
Search patents in H04Q- Granted patents
- 21
- Published applications
- 0
- Assignees
- 13
- Inventors
- 34
- Latest grant
- 6 Oct 1998
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Digital communication device6 Oct 1998US 5,818,870 ACanon Kabushiki Kaisha
- Communication apparatus which can connect a plurality of communication lines17 Feb 1998US 5,719,688 ACanon Kabushiki Kaisha
- Terminal adapter capable of reducing a memory capacity of a buffer memory8 Jul 1997US 5,646,959 ANEC Corporation
- Automatic detection of digital call paths in a telephone system18 Jun 1996US 5,528,679 APrimary Access Corporation
- Telecommunication terminal operating at alternative data throughput rates14 May 1996US 5,517,490 ASociete D'Applications Generales D/Electricite et de Mecanique Sagem
No published applications in this class yet.
Most cited
By later US patents
- Simultaneous voice and data system using the existing two-wire inter-face157US 5,214,650 AAG Communication Systems Corporation · 1993
- Data communication apparatus which can use either an analog or a digital line80US 5,142,568 ACanon Kabushiki Kaisha · 1992
- Method and system for billing an ISDN data user interconnection to the public switched telephone network60US 5,351,286 ABell Communications Research, Inc. · 1994
- Automatic detection of digital call paths in a telephone system49US 5,528,679 APrimary Access Corporation · 1996
- Facsimile apparatus41US 5,050,005 ACanon Kabushiki Kaisha · 1991