H03H 9/21
Crystal tuning forks
H03H9/21 (Crystal tuning forks) appears on 612 US grants and 648 published applications in this corpus.
Search patents in H03H- Granted patents
- 612
- Published applications
- 648
- Assignees
- 91
- Inventors
- 502
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 9 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 3 |
| 2002 | 1 | 8 |
| 2003 | 7 | 9 |
| 2004 | 7 | 14 |
| 2005 | 15 | 21 |
| 2006 | 15 | 21 |
| 2007 | 9 | 21 |
| 2008 | 15 | 26 |
| 2009 | 22 | 45 |
| 2010 | 24 | 59 |
| 2011 | 46 | 100 |
| 2012 | 58 | 48 |
| 2013 | 58 | 34 |
| 2014 | 45 | 43 |
| 2015 | 37 | 31 |
| 2016 | 35 | 30 |
| 2017 | 21 | 13 |
| 2018 | 9 | 8 |
| 2019 | 17 | 21 |
| 2020 | 15 | 9 |
| 2021 | 11 | 11 |
| 2022 | 10 | 13 |
| 2023 | 17 | 22 |
| 2024 | 14 | 24 |
| 2025 | 12 | 7 |
| 2026 | 16 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of manufacturing vibration element15 Sep 2026US 12,738,914 B2Seiko Epson Corporation
- Temperature stable MEMS resonator8 Sep 2026US 12,732,155 B1SiTime Corporation
- Torsional mode quartz crystal device11 Aug 2026US 12,706,590 B2Statek Corporation
- Vibrator device4 Aug 2026US 12,698,966 B2Seiko Epson Corporation
- Vibrator device14 Jul 2026US 12,683,573 B2Seiko Epson Corporation
- Device for imaging and electrochemical sensing17 Sep 2026US 2026/0276574 A1The Board of Trustees of The University of Alabama
- Resonator element and resonator device13 Aug 2026US 2026/0238188 A1Seiko Epson Corporation
- Tuning-Fork-Type Piezoelectric Vibrating Piece, Tuning-Fork-Type Piezoelectric Vibrating Element, and Tuning-Fork-Type Piezoelectric Oscillator30 Jul 2026US 2026/0221956 A1Daishinku Corporation
- Method For Manufacturing Device9 Jul 2026US 2026/0198227 A1Seiko Epson Corporation
- Vibrator element and vibrator device18 Jun 2026US 2026/0173763 A1Seiko Epson Corporation
Most cited
By later US patents
- Grooved-electrode piezoelectric resonator68US 4,384,232 AEbauches S.A. · 1983
- Four bar resonating force transducer58US 5,367,217 AAlliedSignal Inc. · 1994
- Time base comprising an integrated micromechanical tuning fork resonator52US 6,831,531 B1ETA SA Manufacture Horlogere Suisse · 2004
- Vibrating piece, vibrator, oscillator, and electronic equipment48US 6,587,009 B2Seiko Epson Corporation · 2003
- Coupled mode tuning fork type quartz crystal vibrator45US 4,320,320 AKabushiki Kaisha Suwa Seikosha · 1982