H03L 7/26
Automatic control of frequency or phase: using energy levels of molecules, atoms
Official title: using energy levels of molecules, atoms, or subatomic particles as a frequency reference
H03L7/26 (Automatic control of frequency or phase: using energy levels of molecules, atoms) appears on 451 US grants and 390 published applications in this corpus.
Search patents in H03L- Granted patents
- 451
- Published applications
- 390
- Assignees
- 170
- Inventors
- 637
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 7 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 1 |
| 2002 | 3 | 4 |
| 2003 | 2 | 1 |
| 2004 | 3 | 3 |
| 2005 | 3 | 6 |
| 2006 | 6 | 0 |
| 2007 | 0 | 2 |
| 2008 | 3 | 3 |
| 2009 | 0 | 5 |
| 2010 | 4 | 7 |
| 2011 | 6 | 8 |
| 2012 | 6 | 15 |
| 2013 | 6 | 11 |
| 2014 | 14 | 21 |
| 2015 | 23 | 42 |
| 2016 | 42 | 30 |
| 2017 | 18 | 36 |
| 2018 | 23 | 28 |
| 2019 | 45 | 38 |
| 2020 | 56 | 20 |
| 2021 | 19 | 10 |
| 2022 | 16 | 14 |
| 2023 | 13 | 31 |
| 2024 | 21 | 24 |
| 2025 | 24 | 21 |
| 2026 | 15 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Physics package for chip scale atomic clocks and method of making same6 Oct 2026US 12,754,516 B2Microchip Technology Incorporated
- Method and apparatus for compensating a reference frequency shift8 Sep 2026US 12,731,954 B2Adtran Networks SE
- Atomic sensor with self-aligned components25 Aug 2026US 12,717,282 B2Honeywell International Inc.
- Techniques for controlling vapor pressure of subject materials in vapor cells and related methods25 Aug 2026US 12,719,485 B2Microchip Technology Incorporated
- System and method for sensing a signal18 Aug 2026US 12,712,641 B2Rohde & Schwarz GmbH & Co.KG
- Compact millimeter wave system2 Jul 2026US 2026/0186449 A1Texas Instruments Incorporated
- Physics package for chip scale atomic clocks and method of making same23 Apr 2026US 2026/0110989 A1Microchip Technology Incorporated
- Atomic oscillator23 Apr 2026US 2026/0113048 A1NEC Corporation
- Absorbing Gas Species from a Cavity of a Vapor Cell9 Apr 2026US 2026/0098877 A1Quantum Valley Ideas Laboratories
- Forming Antirelaxation Coatings on Interior Surfaces of Vapor Cells9 Apr 2026US 2026/0099125 A1Quantum Valley Ideas Laboratories
Most cited
By later US patents
- Digital frequency generation in atomic frequency standards using digital phase shifting112US 5,721,514 AEfratom Time and Frequency Products, Inc. · 1998
- Methods and apparatus for digital frequency generation in atomic frequency standards106US 5,714,910 AEfratom Time and Frequency Products, Inc. · 1998
- Miniaturized atomic frequency standard86US 5,192,921 AWestinghouse Electric Corp. · 1993
- Miniature frequency standard based on all-optical excitation and a micro-machined containment vessel76US 6,806,784 B2National Institute of Standards and Technology · 2004
- Extended linear ion trap frequency standard apparatus67US 5,420,549 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1995