G01H 3/04
Frequency
G01H3/04 (Frequency) appears on 315 US grants and 337 published applications in this corpus.
Search patents in G01H- Granted patents
- 315
- Published applications
- 337
- Assignees
- 297
- Inventors
- 942
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 0 |
| 2002 | 1 | 5 |
| 2003 | 6 | 3 |
| 2004 | 4 | 5 |
| 2005 | 5 | 2 |
| 2006 | 1 | 4 |
| 2007 | 2 | 2 |
| 2008 | 2 | 9 |
| 2009 | 5 | 8 |
| 2010 | 1 | 4 |
| 2011 | 2 | 6 |
| 2012 | 8 | 3 |
| 2013 | 3 | 7 |
| 2014 | 2 | 7 |
| 2015 | 5 | 7 |
| 2016 | 4 | 6 |
| 2017 | 6 | 16 |
| 2018 | 13 | 23 |
| 2019 | 20 | 31 |
| 2020 | 22 | 32 |
| 2021 | 25 | 28 |
| 2022 | 28 | 28 |
| 2023 | 27 | 34 |
| 2024 | 16 | 29 |
| 2025 | 21 | 19 |
| 2026 | 19 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Acoustic detection of disguised vehicles15 Sep 2026US 12,736,395 B2Oracle International Corporation
- Classifying vibrations1 Sep 2026US 12,723,912 B2Assa Abloy AB
- Method and system of leak detection18 Aug 2026US 12,710,331 B2South East Water Corporation
- Passively measuring room reverb18 Aug 2026US 12,713,179 B2Google Inc.
- Fault state detection apparatus11 Aug 2026US 12,704,481 B2ABB Schweiz AG
- Techniques for detecting anomalies in audio recordings for predictive maintenance24 Sep 2026US 2026/0287420 A1Disney Enterprises, Inc.
- Damping assessment based on combustion signal analysis10 Sep 2026US 2026/0266243 A1Blue Origin Manufacturing, LLC
- Audio-based modal estimation3 Sep 2026US 2026/0257310 A1Fanuc Corporation
- Analysis system, analysis system analysis method, server device, server device control method, and program27 Aug 2026US 2026/0253487 A1Yokogawa Electric Corporation
- Fault monitoring method and fault monitoring system30 Jul 2026US 2026/0219136 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Acoustic signature recognition and identification1,088US 6,173,074 B2Lucent Technologies Inc. · 2001
- Acoustic signature analysis for a noisy enviroment1,038US 5,804,726 AMTD Products Inc · 1998
- System and method of mechanical fault detection based on signature detection1,022US 9,091,588 B2Prognost Systems GmbH · 2015
- Microelectromechanics-based frequency signature sensor89US 5,856,722 ACornell Research Foundation, Inc. · 1999
- Piezoelectrically tunable resonance frequency beam utilizing a stress-sensitive film75US 6,336,366 B12002