G01N 19/02
Measuring coefficient of friction between materials
Official title: Measuring coefficient of friction between materials {(testing of tyres G01M17/02; determinations of friction coefficient used in vehicle braking or traction control systems B60T8/172)}
G01N19/02 (Measuring coefficient of friction between materials) appears on 515 US grants and 425 published applications in this corpus.
Search patents in G01N- Granted patents
- 515
- Published applications
- 425
- Assignees
- 402
- Inventors
- 1,414
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 10 | 0 |
| 1999 | 17 | 0 |
| 2000 | 12 | 0 |
| 2001 | 16 | 6 |
| 2002 | 15 | 21 |
| 2003 | 21 | 20 |
| 2004 | 16 | 10 |
| 2005 | 17 | 13 |
| 2006 | 13 | 17 |
| 2007 | 10 | 11 |
| 2008 | 8 | 13 |
| 2009 | 12 | 14 |
| 2010 | 9 | 6 |
| 2011 | 6 | 6 |
| 2012 | 5 | 10 |
| 2013 | 12 | 19 |
| 2014 | 18 | 17 |
| 2015 | 8 | 22 |
| 2016 | 12 | 14 |
| 2017 | 20 | 14 |
| 2018 | 18 | 15 |
| 2019 | 10 | 24 |
| 2020 | 17 | 34 |
| 2021 | 28 | 19 |
| 2022 | 19 | 23 |
| 2023 | 18 | 22 |
| 2024 | 17 | 13 |
| 2025 | 20 | 25 |
| 2026 | 12 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for evaluating rock compressive strength based on cuttings mineral composition, nano-indentation, and friction tests22 Sep 2026US 12,742,713 B2Southwest Petroleum University
- Method for evaluating texture upon swallowing foods or drinks and method for producing formulation for improving swallowing texture25 Aug 2026US 12,716,824 B2San-Ei Gen F. F. I., Inc.
- Calibration of drillstring weight with drag for friction factor estimation11 Aug 2026US 12,704,058 B2Landmark Graphics Corporation
- Friction-based tactile sensor for measuring grip security14 Jul 2026US 12,678,972 B2Contactile Pty Ltd
- Portable internal friction measuring instrument and internal friction measurement method7 Jul 2026US 12,674,742 B2Cgn Power Co., Ltd.
- Road condition monitoring system17 Sep 2026US 2026/0276527 A1The Goodyear Tire & Rubber Company
- Evaluating wear of a tire with a non-axisymmetric tread pattern3 Sep 2026US 2026/0259112 A1
- Method for evaluating rock compressive strength based on cuttings mineral composition, nano-indentation, and friction tests20 Aug 2026US 2026/0243642 A1Southwest Petroleum University
- Friction testing apparatus and method13 Aug 2026US 2026/0235494 A1
- Evaluation method and evaluation apparatus23 Jul 2026US 2026/0210824 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Method of endpoint detection during chemical/mechanical planarization of semiconductor wafers292US 5,036,015 AMicron Technology, Inc. · 1991
- Road surface condition determining system93US 5,944,392 AMazda Motor Corporation · 1999
- Arrangement for detecting a critical driving torque in a motor vehicle89US 5,419,624 AMannesmann Aktiengesellschaft · 1995
- Method and apparatus for determining fan bearing friction86US 5,621,159 ADell USA, L. P. · 1997
- Method and device for examining the wear and friction properties of surface materials exposed to sliding friction64US 4,939,922 ASKF Industrial Trading and Development Company, B.V. · 1990