G01N 2291/2691
Bolts, screws, heads
G01N2291/2691 (Bolts, screws, heads) appears on 87 US grants and 70 published applications in this corpus.
Search patents in G01N- Granted patents
- 87
- Published applications
- 70
- Assignees
- 65
- Inventors
- 197
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 2 | 3 |
| 2010 | 1 | 2 |
| 2011 | 1 | 3 |
| 2012 | 2 | 3 |
| 2013 | 4 | 2 |
| 2014 | 1 | 1 |
| 2015 | 3 | 3 |
| 2016 | 3 | 4 |
| 2017 | 2 | 5 |
| 2018 | 4 | 5 |
| 2019 | 7 | 2 |
| 2020 | 3 | 6 |
| 2021 | 3 | 6 |
| 2022 | 3 | 2 |
| 2023 | 6 | 7 |
| 2024 | 4 | 3 |
| 2025 | 2 | 5 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for non-destructive parts testing9 Jun 2026US 12,650,410 B2
- Method, use, and device for ultrasonic double-wave measurement of pre-tightening force and temperature of solid material28 Apr 2026US 12,613,115 B2Lvyin Technology (Wuhan) Co., Ltd.
- Monitoring wear assembles, systems, and methods for mining equipment21 Apr 2026US 12,607,447 B2Carriere Industrial Supply Limited
- Electromagnetic ultrasonic double-wave transducer21 Oct 2025US 12,449,320 B2Suzhou Phaserise Technology Co., Ltd.
- Multilayer bolthole nondestructive inspection (NDI)9 Sep 2025US 12,411,113 B2Texas Research International, Inc.
- Method and system for measuring a variation in a dimension of a mechanical part30 Apr 2026US 2026/0118320 A1
- Tightening control method and automatic tightening device for aero-engine rotor based on bolt preload feedback9 Oct 2025US 2025/0312873 A1Dalian University of Technology
- Automated evaluation of used screws21 Aug 2025US 2025/0264443 A1
- Ultrasonic inspection robot for threaded connection structure of rotor internal cavity10 Jul 2025US 2025/0224380 A1Dalian University of Technology
- Ultrasonic dual-wave high-reliability measurement method and apparatus for bolt stress8 May 2025US 2025/0146976 A1Suzhou Phaserise Technology Co., Ltd.
Most cited
By later US patents
- Ultrasonic load indicating member, apparatus and method69US 4,899,591 ASPS Technologies, Inc. · 1990
- Ultrasonic load indicating member64US 4,846,001 ASPS Technologies, Inc. · 1989
- Method and system to measure dynamic loads or stresses in aircraft, machines, and structures60US 6,354,152 B12002
- Fastener incorporating ultrasonic transducer58US 4,294,122 AGeneral Dynamics Corporation · 1981
- Butt-coupled single transverse mode diode pumped laser56US 4,847,851 AUniversity of South Florida · 1989