G04R 40/00
Correcting the clock frequency
G04R40/00 (Correcting the clock frequency) appears on 80 US grants and 61 published applications in this corpus.
Search patents in G04R- Granted patents
- 80
- Published applications
- 61
- Assignees
- 67
- Inventors
- 174
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 3 |
| 2002 | 1 | 2 |
| 2003 | 3 | 3 |
| 2004 | 2 | 1 |
| 2005 | 2 | 3 |
| 2006 | 4 | 1 |
| 2007 | 2 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 1 | 1 |
| 2012 | 1 | 3 |
| 2013 | 2 | 2 |
| 2014 | 0 | 5 |
| 2015 | 1 | 1 |
| 2016 | 3 | 3 |
| 2017 | 2 | 1 |
| 2018 | 1 | 7 |
| 2019 | 7 | 1 |
| 2020 | 2 | 5 |
| 2021 | 1 | 4 |
| 2022 | 2 | 5 |
| 2023 | 5 | 0 |
| 2024 | 3 | 3 |
| 2025 | 2 | 1 |
| 2026 | 4 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Auxiliary precision timekeeper for GPS receiver15 Sep 2026US 12,736,926 B2BAE Systems Information and Electronic Systems Integration Inc.
- Electronic timepiece, storage medium storing program, and time correction method16 Jun 2026US 12,656,741 B2Casio Computer Co., Ltd.
- Method and device for calibrating a time base signal in a photovoltaic inverter3 Mar 2026US 12,567,814 B2Fronius International GmbH
- Frequency control assist device, frequency control device, and radio device27 Jan 2026US 12,535,777 B2Icom Incorporated
- Method for adjusting a clock on board a motor vehicle and associated adjusting device22 Jul 2025US 12,366,833 B2Continental Automotive Technologies GmbH
- Auxiliary precision timekeeper for gps receiver21 Aug 2025US 2025/0264848 A1BAE Systems Information and Electronic Systems Integration Inc.
- Frequency control assist device, frequency control device, and radio device22 Aug 2024US 2024/0280944 A1Icom Incorporated
- Method and Device for Calibrating a Time Base Signal in a Photovoltaic Inverter22 Aug 2024US 2024/0283348 A1Fronius International GmbH
- Electronic timepiece, storage medium storing program, and time correction method28 Mar 2024US 2024/0103448 A1Casio Computer Co., Ltd.
- Method for adjusting a clock on board a motor vehicle and associated adjusting device17 Nov 2022US 2022/0365490 A1Continental Automotive GmbH
Most cited
By later US patents
- GPS synchronized frequency/time source108US 5,440,313 AStellar GPS Corporation · 1995
- System and method for synchronizing clocks in a plurality of devices across a communication channel89US 6,236,623 B1Moore Industries · 2001
- Time corrected, continuously updated clock86US 4,582,434 AHeath Company · 1986
- Time synchronization apparatus and a method thereof using a global positioning system of a satellite55US 5,757,786 AHyundai Electronics Industries Co., Ltd. · 1998
- High precision radio signal controlled continuously updated digital clock47US 4,768,178 APrecision Standard Time, Inc. · 1988