G01M 3/38
Investigating fluid-tightness of structures: by using light
Official title: by using light (G01M3/02 takes precedence)
G01M3/38 (Investigating fluid-tightness of structures: by using light) appears on 774 US grants and 843 published applications in this corpus.
Search patents in G01M- Granted patents
- 774
- Published applications
- 843
- Assignees
- 546
- Inventors
- 1,866
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 9 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 11 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 1 |
| 2002 | 5 | 11 |
| 2003 | 13 | 7 |
| 2004 | 7 | 19 |
| 2005 | 3 | 8 |
| 2006 | 12 | 8 |
| 2007 | 7 | 12 |
| 2008 | 8 | 14 |
| 2009 | 10 | 7 |
| 2010 | 10 | 16 |
| 2011 | 6 | 7 |
| 2012 | 4 | 15 |
| 2013 | 11 | 19 |
| 2014 | 13 | 21 |
| 2015 | 16 | 39 |
| 2016 | 28 | 23 |
| 2017 | 27 | 35 |
| 2018 | 37 | 52 |
| 2019 | 52 | 79 |
| 2020 | 51 | 67 |
| 2021 | 63 | 59 |
| 2022 | 45 | 59 |
| 2023 | 47 | 62 |
| 2024 | 60 | 77 |
| 2025 | 67 | 67 |
| 2026 | 45 | 59 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Time-of-flight measurement on user with cameras and position sensor6 Oct 2026US 12,751,628 B2Omni Medsci, Inc.
- Leak-detection system and methods for leak detection15 Sep 2026US 12,736,434 B2California Institute of Technology
- Remote sensing system with time-of-flight sensor, active illuminator and light sensing system1 Sep 2026US 12,721,527 B2Omni Medsci, Inc.
- Apparatuses, systems and methods for vial seal inspection1 Sep 2026US 12,723,943 B2Amgen Inc.
- Gas leak detection device and detecting method28 Jul 2026US 12,693,185 B2VIA Technologies, Inc.
- Method and apparatus for testing the tightness of a container closed by a membrane8 Oct 2026US 2026/0309575 A1G. D S.p.A.
- Leveraging fiber optic-based pipeline monitoring for microseismic monitoring8 Oct 2026US 2026/0309890 A1Schlumberger Technology Corporation
- A novel technique for leak detection and quantification using fiber bragg gratings1 Oct 2026US 2026/0298764 A1
- Systems and methods for checking personal protection device functionality27 Aug 2026US 2026/0249111 A13M Innovative Properties Company
- Gas and gas-leak detection system and methods therefor27 Aug 2026US 2026/0251524 A1California Institute of Technology
Most cited
By later US patents
- Methods for differential image quality enhancement for a multiple detector system, systems and use thereof1,019US 9,471,969 B2ExxonMobil Upstream Research Company · 2016
- System and method for remote quantitative detection of fluid leaks from a natural gas or oil pipeline148US 6,822,742 B1Eastman Kodak Company · 2004
- Fluid control valve and system with leak detection and containment119US 4,901,751 ASystems Chemistry, Inc. · 1990
- Gas visualizing apparatus and method for detecting gas leakage from tanks or piping115US 5,430,293 AOsaka Gas Co., Ltd. · 1995
- Method and apparatus for remotely detecting gases in the atmosphere100US 4,390,785 AE. I. Du Pont de Nemours and Company · 1983