H04Q 2213/337
Picturephone
H04Q2213/337 (Picturephone) appears on 22 US grants and 1 published applications in this corpus.
Search patents in H04Q- Granted patents
- 22
- Published applications
- 1
- Assignees
- 8
- Inventors
- 39
- Latest grant
- 4 Sep 2001
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 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Picture codec and teleconference terminal equipment4 Sep 2001US 6,285,391 B1Hitachi, Ltd.
- Picture codec and teleconference terminal equipment19 Jun 2001US 6,249,309 B1Hitachi, Ltd.
- Video telephone for the real-time exchange of image and other data through a digital communications network7 Mar 2000US 6,034,715 AHitachi, Ltd.
- Television telephone12 Oct 1999US 5,966,164 AHitachi, Ltd.
- Picture codec for teleconference equipment, which forms and displays picture-in-frame including at least two of received motion picture, a received still picture and a self motion picture in an optional combination4 Aug 1998US 5,790,178 AHitachi, Ltd.
Most cited
By later US patents
- Video telephone150US 5,400,068 AHitachi, Ltd. · 1995
- ISDN-based system for making a video call147US 5,371,534 AAT&T Corp. · 1994
- Video telephone for the real-time exchange of image and other data through a digital communications network135US 6,034,715 AHitachi, Ltd. · 2000
- Video telephone85US 5,587,735 AHitachi, Ltd. · 1996
- Audio and video telecommunication system with remote monitoring function and remote device control function56US 5,585,839 AHitachi, Ltd. · 1996