H04N 1/32743
Generating ring-back signals or tones
Official title: {Generating ring-back signals or tones}
H04N1/32743 (Generating ring-back signals or tones) appears on 15 US grants and 4 published applications in this corpus.
Search patents in H04N- Granted patents
- 15
- Published applications
- 4
- Assignees
- 11
- Inventors
- 36
- Latest grant
- 14 Aug 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Image communication apparatus capable of performing facsimile communication via IP network, method of controlling the same, and storage medium14 Aug 2018US 10,051,137 B2Canon Kabushiki Kaisha
- Image communication apparatus capable of performing facsimile communication via IP network, method of controlling the same, and storage medium17 Jan 2017US 9,549,083 B2Canon Kabushiki Kaisha
- Communication terminal apparatus5 Nov 2013US 8,577,020 B2Oki Data Corporation
- Method and apparatus for validation of facsimile communication30 Mar 2010US 7,688,956 B2Lexmark International, Inc.
- Automatic facsimile/data/voice switch9 Feb 1999US 5,870,458 A
- Image communication apparatus capable of performing facsimile communication via ip network, method of controlling the same, and storage medium30 Mar 2017US 2017/0094068 A1Canon Kabushiki Kaisha
- Image communication apparatus capable of performing facsimile communication via ip network, method of controlling the same, and storage medium9 Jun 2016US 2016/0165069 A1Canon Kabushiki Kaisha
- Communication terminal apparatus15 Apr 2010US 2010/0091962 A1Oki Data Corporation
- Method and apparatus for validation of facsimile communication29 Dec 2005US 2005/0286072 A1Lexmark International, Inc.
Most cited
By later US patents
- Facsimile receiving method and facsimile apparatus carrying out the method22US 5,377,257 AHitachi, Ltd. · 1994
- Facsimile machine having answering function19US 5,444,771 AMurata Kikai Kabushiki Kaisha · 1995
- Facsimile detection system and method19US 5,519,768 ABellSouth Corporation · 1996
- Data communication apparatus18US 5,255,311 ACanon Kabushiki Kaisha · 1993
- Image telecommunication apparatus17US 5,337,349 AMatsushita Graphic Communication Systems, Inc. · 1994