H04M 1/505
Signals generated in digital form
Official title: {signals generated in digital form}
H04M1/505 (Signals generated in digital form) appears on 90 US grants and 41 published applications in this corpus.
Search patents in H04M- Granted patents
- 90
- Published applications
- 41
- Assignees
- 57
- Inventors
- 159
- Latest grant
- 21 Sep 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 3 |
| 2003 | 5 | 4 |
| 2004 | 1 | 6 |
| 2005 | 4 | 2 |
| 2006 | 3 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 5 |
| 2009 | 0 | 2 |
| 2010 | 2 | 0 |
| 2011 | 0 | 2 |
| 2012 | 2 | 0 |
| 2013 | 6 | 6 |
| 2014 | 2 | 1 |
| 2015 | 2 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 0 |
| 2021 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Systems and methods for content delivery and management21 Sep 2021US 11,126,394 B2Lisnr, Inc.
- Access control and validation using sonic tones27 Jul 2021US 11,074,033 B2Lisnr, Inc.
- Mobile terminal for automatically making a telephone conversation using artificial intelligence11 Aug 2020US 10,742,808 B2LG Electronics Inc.
- Mobile terminal3 Sep 2019US 10,404,857 B2LG Electronics Inc.
- All-digital phase locked loop (ADPLL) including a digital-to-time converter (DTC) and a sampling time-to-digital converter (TDC)22 Aug 2017US 9,740,175 B2Marvell World Trade Ltd.
- Mobile terminal4 Jul 2019US 2019/0208057 A1LG Electronics Inc.
- Mobile terminal23 May 2019US 2019/0158665 A1LG Electronics Inc.
- Access control and validation using sonic tones15 Nov 2018US 2018/0329676 A1Lisnr, Inc.
- All-digital phase locked loop (adpll) including a digital-to-time converter (dtc) and a sampling time-to-digital converter (tdc)20 Jul 2017US 2017/0205772 A1Marvell World Trade Ltd.
- Interactive Response Telephony29 Sep 2016US 2016/0286017 A1Microsoft Technology Licensing, LLC
Most cited
By later US patents
- Personal digital assistant module adapted for initiating telephone communications through DTMF dialing231US 5,522,089 ACordata, Inc. · 1996
- Method and apparatus for DTMF detection55US 5,818,929 ACanon Kabushiki Kaisha · 1998
- ADPCM transcoder with integral tone generation and method therefor42US 5,384,807 AMotorola, Inc. · 1995
- Method and system for the high-speed generation and transmission of a sequence of characters by means of voice frequencies37US 5,859,913 AFintel S.A. · 1999
- System and method for use of dual-tone multi frequency signals in a wireless communication system28US 6,542,732 B1QUALCOMM Incorporated · 2003