G01B 9/02002
Using two or more frequencies
Official title: using two or more frequencies
G01B9/02002 (Using two or more frequencies) appears on 1,167 US grants and 1,145 published applications in this corpus.
Search patents in G01B- Granted patents
- 1,167
- Published applications
- 1,145
- Assignees
- 451
- Inventors
- 1,685
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 7 | 0 |
| 1991 | 2 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 20 | 0 |
| 1995 | 11 | 0 |
| 1996 | 14 | 0 |
| 1997 | 9 | 0 |
| 1998 | 16 | 0 |
| 1999 | 15 | 0 |
| 2000 | 18 | 0 |
| 2001 | 24 | 5 |
| 2002 | 12 | 14 |
| 2003 | 23 | 45 |
| 2004 | 28 | 28 |
| 2005 | 32 | 39 |
| 2006 | 32 | 55 |
| 2007 | 31 | 47 |
| 2008 | 43 | 50 |
| 2009 | 51 | 39 |
| 2010 | 31 | 58 |
| 2011 | 43 | 44 |
| 2012 | 29 | 48 |
| 2013 | 56 | 50 |
| 2014 | 48 | 60 |
| 2015 | 37 | 62 |
| 2016 | 49 | 48 |
| 2017 | 55 | 56 |
| 2018 | 55 | 49 |
| 2019 | 57 | 42 |
| 2020 | 40 | 48 |
| 2021 | 47 | 63 |
| 2022 | 47 | 48 |
| 2023 | 41 | 51 |
| 2024 | 33 | 35 |
| 2025 | 44 | 25 |
| 2026 | 16 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Interferometric displacement measurement apparatus15 Sep 2026US 12,736,324 B2Oxford University Innovation Limited
- Second harmonic generation (SHG) measurement device and measurement method using the same1 Sep 2026US 12,723,863 B2Samsung Electronics Co., Ltd.
- Image acquisition at accurate start wavelength25 Aug 2026US 12,714,286 B2Canon U.S.A., Inc.
- Apparatus and methods to enhance signal to noise ratio imaging performance in optical coherence tomography21 Jul 2026US 12,687,384 B2The General Hospital Corporation
- Optical heterodyne interference measurement device and optical heterodyne interference measurement method14 Jul 2026US 12,680,807 B2Hamamatsu Photonics K.K.
- Method for driving laser light source and laser interferometer1 Oct 2026US 2026/0298612 A1Seiko Epson Corporation
- Optical sensor modules with interferometric sensing1 Oct 2026US 2026/0298615 A1Apple Inc.
- Apparatus and methods to enhance signal to noise ratio imaging performance in optical coherence tomography24 Sep 2026US 2026/0287326 A1The General Hospital Corporation
- Displacement sensing10 Sep 2026US 2026/0266594 A1UNM Rainforest Innovations
- Cat's-eye swept source laser for OCT and spectroscopy27 Aug 2026US 2026/0251565 A1
Most cited
By later US patents
- Method and apparatus for optical imaging with means for controlling the longitudinal range of the sample1,199US 5,321,501 AMassachusetts Institute of Technology · 1994
- Method and apparatus for performing optical measurements using a fiber optic imaging guidewire, catheter or endoscope1,079US 6,134,003 AMassachusetts Institute of Technology · 2000
- Method and apparatus for performing optical measurements1,018US 5,459,570 AMassachusetts Institute of Technology · 1995
- Fiber optic imaging endoscope interferometer with at least one faraday rotator710US 6,501,551 B1Massachusetts Institute of Technology · 2002
- Methods and apparatus for high speed longitudinal scanning in imaging systems551US 6,191,862 B1LightLab Imaging, Inc. · 2001