H01Q 3/2647
Retrodirective arrays
Official title: {Retrodirective arrays}
H01Q3/2647 (Retrodirective arrays) appears on 81 US grants and 74 published applications in this corpus.
Search patents in H01Q- Granted patents
- 81
- Published applications
- 74
- Assignees
- 59
- Inventors
- 177
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 4 | 2 |
| 2003 | 3 | 0 |
| 2004 | 3 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 3 |
| 2009 | 2 | 1 |
| 2010 | 2 | 6 |
| 2011 | 4 | 3 |
| 2012 | 2 | 6 |
| 2013 | 4 | 5 |
| 2014 | 6 | 9 |
| 2015 | 5 | 4 |
| 2016 | 6 | 2 |
| 2017 | 4 | 2 |
| 2018 | 1 | 2 |
| 2019 | 1 | 3 |
| 2020 | 0 | 6 |
| 2021 | 9 | 1 |
| 2022 | 1 | 6 |
| 2023 | 1 | 1 |
| 2024 | 3 | 4 |
| 2025 | 3 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Retrodirective surface mount antennas8 Sep 2026US 12,731,890 B2Microsoft Technology Licensing, LLC
- Responder and positioning system17 Mar 2026US 12,580,296 B2Seiko Epson Corporation
- Embedded antennas structures for wireless communications and radar25 Nov 2025US 12,482,928 B2Intel Corporation
- Methods, systems, and low power retro-directive RF tags for localization22 Jul 2025US 12,366,649 B2Carnegie Mellon University
- Antenna array for passively modulating radio frequency signals27 May 2025US 12,316,034 B2The United States of America as represented by the Secretary of the Navy
- Retroreflective antenna, and object detecting system12 Feb 2026US 2026/0045687 A1Sumitomo Electric Industries, Ltd.
- Embedded antennas structures for wireless communications and radar8 Jan 2026US 2026/0011910 A1Intel Corporation
- Communication device comprising a retroreflective structure20 Feb 2025US 2025/0062528 A1Huawei Technologies Co., Ltd.
- Responder and positioning system6 Feb 2025US 2025/0046982 A1Seiko Epson Corporation
- Antenna array for passively modulating radio frequency signals26 Dec 2024US 2024/0429613 A1The United States of America as represented by the Secretary of the Navy
Most cited
By later US patents
- Wireless power transmission system and method331US 8,072,380 B2Raytheon Company · 2011
- Retrodirective antenna systems270US 8,284,101 B2The Queen's University of Belfast · 2012
- Repeaters for wireless communication systems253US 7,577,398 B2Andrew Corporation · 2009
- Integrated repeater227US 6,934,511 B1Andrew Corporation · 2005
- Combination directional/omnidirectional antenna185US 6,864,853 B2Andrew Corporation · 2005