G01N 2291/0421
Longitudinal waves
G01N2291/0421 (Longitudinal waves) appears on 506 US grants and 248 published applications in this corpus.
Search patents in G01N- Granted patents
- 506
- Published applications
- 248
- Assignees
- 311
- Inventors
- 1,091
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 11 | 0 |
| 1985 | 3 | 0 |
| 1986 | 12 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 9 | 0 |
| 1992 | 11 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 18 | 0 |
| 1996 | 21 | 0 |
| 1997 | 20 | 0 |
| 1998 | 23 | 0 |
| 1999 | 14 | 0 |
| 2000 | 19 | 0 |
| 2001 | 19 | 3 |
| 2002 | 25 | 9 |
| 2003 | 20 | 33 |
| 2004 | 26 | 15 |
| 2005 | 18 | 20 |
| 2006 | 10 | 21 |
| 2007 | 15 | 15 |
| 2008 | 12 | 14 |
| 2009 | 7 | 14 |
| 2010 | 19 | 8 |
| 2011 | 9 | 4 |
| 2012 | 12 | 5 |
| 2013 | 7 | 3 |
| 2014 | 7 | 4 |
| 2015 | 1 | 9 |
| 2016 | 2 | 7 |
| 2017 | 8 | 7 |
| 2018 | 6 | 7 |
| 2019 | 3 | 4 |
| 2020 | 7 | 8 |
| 2021 | 4 | 10 |
| 2022 | 8 | 5 |
| 2023 | 5 | 11 |
| 2024 | 12 | 6 |
| 2025 | 7 | 5 |
| 2026 | 6 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus for measuring height of foreign substance in pipe19 May 2026US 12,631,599 B2Center for Advanced Meta-Materials
- Self-cleaning optical probe5 May 2026US 12,618,769 B2Inov8 Systems Limited
- Apparatus for ultrasonically measuring thin film thickness with retroreflector and method thereof21 Apr 2026US 12,607,461 B2Center for Advanced Meta-Materials
- Ultrasonic inspection device and ultrasonic inspection unit14 Apr 2026US 12,601,715 B2National University Corporation Nagaoka University of Technology
- Apparatus for ultrasonically measuring thin film thickness with retroreflector and method thereof17 Mar 2026US 12,578,187 B2Center for Advanced Meta-Materials
- Method For Detecting Cracks In A Tubular Pipe27 Aug 2026US 2026/0251618 A1Electricite de France
- Device for measuring the median radius of bubbles in a foamed plaster blend17 Jul 2025US 2025/0231096 A1
- Ultrasonic dual-wave high-reliability measurement method and apparatus for bolt stress8 May 2025US 2025/0146976 A1Suzhou Phaserise Technology Co., Ltd.
- System and method for corrosion and erosion monitoring of fixed equipment6 Mar 2025US 2025/0076179 A1Molex Incorporated
- Electromagnetic ultrasonic double-wave transducer13 Feb 2025US 2025/0052629 A1Suzhou Phaserise Technology Co., Ltd.
Most cited
By later US patents
- Microfabricated reactor427US 5,639,423 AThe Regents of the University of Calfornia · 1997
- Microfabricated reactor293US 5,674,742 AThe Regents of the University of California · 1997
- Method and apparatus for elasticity imaging using remotely induced shear wave263US 5,810,731 AArtann Laboratories, Inc. · 1998
- Microfabricated reactor241US 5,646,039 AThe Regents of the University of California · 1997
- Method and device for shear wave elasticity imaging220US 5,606,971 AArtann Corporation, a NJ Corp. · 1997