G01J 5/44
Using change of resonant frequency
Official title: using change of resonant frequency, e.g. of piezoelectric crystals
G01J5/44 (Using change of resonant frequency) appears on 52 US grants and 50 published applications in this corpus.
Search patents in G01J- Granted patents
- 52
- Published applications
- 50
- Assignees
- 40
- Inventors
- 121
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 1 | 2 |
| 2012 | 2 | 2 |
| 2013 | 2 | 3 |
| 2014 | 0 | 1 |
| 2015 | 3 | 2 |
| 2016 | 6 | 5 |
| 2017 | 3 | 11 |
| 2018 | 5 | 2 |
| 2019 | 6 | 5 |
| 2020 | 4 | 2 |
| 2021 | 4 | 0 |
| 2022 | 0 | 2 |
| 2023 | 1 | 3 |
| 2024 | 0 | 1 |
| 2025 | 1 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Tunable resonant circuit comprising a RF resonator geometry disposed on an active material layer such that resonance changes when photon energy is applied7 Sep 2021US 11,114,738 B2The United States of America as represented by the Secretary of the Air Force
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Most cited
By later US patents
- Opto-electro-mechanical device or filter, process for making, and sensors made therefrom408US 5,559,358 AHoneywell Inc. · 1996
- Nano- and micro-electromechanical resonators275US 9,425,765 B2Northeastern University · 2016
- Electromagnetic and nuclear radiation detector using micromechanical sensors49US 6,118,124 ALockheed Martin Energy Research Corporation · 2000
- Non-contact passive temperature measuring system and method of operation using micro-mechanical sensors41US 6,050,722 A2000
- High sensitivity temperature sensor and sensor array37US 5,686,779 AThe United States of America as represented by the Secretary of the Army · 1997