G01P 3/366
By using diffraction of light
Official title: {by using diffraction of light (for measuring speed of fluids G01P5/26)}
G01P3/366 (By using diffraction of light) appears on 157 US grants and 87 published applications in this corpus.
Search patents in G01P- Granted patents
- 157
- Published applications
- 87
- Assignees
- 87
- Inventors
- 289
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 0 |
| 2002 | 5 | 2 |
| 2003 | 3 | 4 |
| 2004 | 4 | 3 |
| 2005 | 2 | 7 |
| 2006 | 5 | 5 |
| 2007 | 2 | 3 |
| 2008 | 5 | 4 |
| 2009 | 1 | 5 |
| 2010 | 5 | 9 |
| 2011 | 4 | 7 |
| 2012 | 5 | 6 |
| 2013 | 5 | 4 |
| 2014 | 5 | 2 |
| 2015 | 4 | 1 |
| 2016 | 3 | 0 |
| 2017 | 0 | 2 |
| 2018 | 3 | 2 |
| 2019 | 2 | 4 |
| 2020 | 0 | 2 |
| 2021 | 4 | 3 |
| 2022 | 2 | 5 |
| 2023 | 4 | 4 |
| 2024 | 2 | 2 |
| 2025 | 3 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Laser interferometer21 Apr 2026US 12,607,869 B2Seiko Epson Corporation
- Photonic doppler velocimetry (PDV) system for ultra-high-speed instantaneous measurement30 Sep 2025US 12,429,590 B2Beijing Changcheng Institute of Metrology & Measurement, AVIC
- Self-mixing interference based sensors for characterizing touch input20 May 2025US 12,305,982 B2Apple Inc.
- Scattered light signal measuring apparatus and information processing apparatus11 Mar 2025US 12,245,846 B2Sony Corporation
- Laser interferometer31 Dec 2024US 12,181,277 B2Seiko Epson Corporation
- Self-mixing interference based sensors for characterizing touch input24 Jul 2025US 2025/0237492 A1Apple Inc.
- Optical Modulator And Laser Interferometer30 May 2024US 2024/0176157 A1Seiko Epson Corporation
- Laser vehicle speed detection system9 May 2024US 2024/0151848 A1The Boeing Company
- Laser Interferometer5 Oct 2023US 2023/0314121 A1Seiko Epson Corporation
- Self-Mixing Interference Based Sensors for Characterizing Touch Input14 Sep 2023US 2023/0288186 A1Apple Inc.
Most cited
By later US patents
- Method of measuring the movement of an input device185US 6,707,027 B2Koninklijke Philips Electronics N. V. · 2004
- White light velocity interferometer144US 5,910,839 AThe Regents of the University of California · 1999
- Optical translation measurement130US 6,424,407 B1Otm Technologies Ltd. · 2002
- Rotation quantity measuring method and system117US 4,987,299 ARicoh Company, Ltd. · 1991
- Flexible fiber optic probe for high-pressure shock experiments105US 5,202,558 A1993