H04Q 2213/286
Direct inward dialling [pbx]
Official title: Direct inward dialling [PBX]
H04Q2213/286 (Direct inward dialling [pbx]) appears on 3 US grants and 0 published applications in this corpus.
Search patents in H04Q- Granted patents
- 3
- Published applications
- 0
- Assignees
- 3
- Inventors
- 5
- Latest grant
- 8 Sep 1998
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Communication terminal device8 Sep 1998US 5,805,684 AYamaha Corporation
- Data terminal control unit including table for efficiently making connections between data terminal equipments and between data terminal equipment and outside lines10 Oct 1995US 5,457,693 ASharp Kabushiki Kaisha
- Radio communication apparatus for ISDN18 Oct 1994US 5,357,558 ASony Corporation
No published applications in this class yet.
Most cited
By later US patents
- Radio communication apparatus for ISDN14US 5,357,558 ASony Corporation · 1994
- Data terminal control unit including table for efficiently making connections between data terminal equipments and between data terminal equipment and outside lines8US 5,457,693 ASharp Kabushiki Kaisha · 1995
- Communication terminal device2US 5,805,684 AYamaha Corporation · 1998