H04J 9/00
Multiplex systems in which each channel is represented by a different type
Official title: Multiplex systems in which each channel is represented by a different type of modulation of the carrier
H04J9/00 (Multiplex systems in which each channel is represented by a different type) appears on 65 US grants and 31 published applications in this corpus.
Search patents in H04J- Granted patents
- 65
- Published applications
- 31
- Assignees
- 41
- Inventors
- 102
- Latest grant
- 9 Jun 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 8 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 3 | 5 |
| 2005 | 0 | 5 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 2 | 0 |
| 2009 | 1 | 1 |
| 2010 | 4 | 3 |
| 2011 | 2 | 0 |
| 2012 | 2 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 3 |
| 2015 | 0 | 1 |
| 2016 | 5 | 4 |
| 2017 | 2 | 1 |
| 2018 | 2 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dual mode communication systems and methods9 Jun 2020US 10,680,755 B2Intellectual Ventures I LLC
- Test system and test method18 Jun 2019US 10,326,539 B2Rohde & Schwarz GmbH & Co.KG
- Method and system for transmitting a data frame of an electromagnetic telemetry signal to or from a downhole location12 Feb 2019US 10,202,844 B2Evoution Engineering Inc.
- Dual mode communication systems and methods16 Oct 2018US 10,103,845 B2Intellectual Ventures I LLC
- Method and system for transmitting a data frame of an electromagnetic telemetry signal to or from a downhole location5 Jun 2018US 9,988,896 B2Evolution Engineering Inc.
- Dual mode communication systems and methods22 Aug 2019US 2019/0260512 A1Intellectual Ventures I LLC
- Test system and test method18 Oct 2018US 2018/0302178 A1Rohde & Schwarz GmbH & Co.KG
- Method and system for transmitting a data frame of an electromagnetic telemetry signal to or from a downhole location8 Jun 2017US 2017/0159427 A1Evolution Engineering Inc.
- Data-modulated pilots for phase and gain detectors14 Jul 2016US 2016/0204888 A1QUALCOMM Incorporated
- Method and system for unified rate adaptation for su-bf and mu-mimo operation14 Jul 2016US 2016/0204897 A1QUALCOMM Incorporated
Most cited
By later US patents
- Method and apparatus for transporting auxiliary data in audio signals346US 5,822,360 ASolana Technology Development Corporation · 1998
- System for simultaneous analog and digital communications over an analog channel241US 5,410,541 AIvon International, Inc. · 1995
- Method and system for simultaneously broadcasting and receiving digital and analog signals179US 5,956,624 AUSA Digital Radio Partners, L.P. · 1999
- AM compatible digital audio broadcasting signal transmision using digitally modulated orthogonal noise-like sequences166US 5,956,373 AUSA Digital Radio Partners, L.P. · 1999
- Method and apparatus for embedding auxiliary data in a primary data signal165US 5,937,000 ASolana Technology Development Corporation · 1999