G01F 23/2928
Using light reflected on the material surface
Official title: {using light reflected on the material surface}
G01F23/2928 (Using light reflected on the material surface) appears on 131 US grants and 156 published applications in this corpus.
Search patents in G01F- Granted patents
- 131
- Published applications
- 156
- Assignees
- 133
- Inventors
- 410
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 1 |
| 2003 | 3 | 2 |
| 2004 | 1 | 4 |
| 2005 | 1 | 2 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 2 | 5 |
| 2009 | 3 | 3 |
| 2010 | 2 | 7 |
| 2011 | 3 | 1 |
| 2012 | 3 | 3 |
| 2013 | 1 | 2 |
| 2014 | 0 | 2 |
| 2015 | 5 | 2 |
| 2016 | 1 | 6 |
| 2017 | 4 | 10 |
| 2018 | 2 | 11 |
| 2019 | 14 | 6 |
| 2020 | 9 | 10 |
| 2021 | 5 | 10 |
| 2022 | 6 | 15 |
| 2023 | 14 | 19 |
| 2024 | 10 | 15 |
| 2025 | 7 | 8 |
| 2026 | 8 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sensor device for measuring the level of material contained in a container25 Aug 2026US 12,716,763 B2Lesaffre Et Compagnie
- Apparatus for filling a container with bulk material4 Aug 2026US 12,698,108 B2Nowe GmbH
- Filling rate measurement method, information processing device, and recording medium28 Apr 2026US 12,613,093 B2Panasonic Intellectual Property Management Co., Ltd.
- Liquid sensor and hydraulic unit31 Mar 2026US 12,590,943 B2Daikin Industries, Ltd.
- Optical level gauge apparatus and method, liquid tank assembly and vehicle employing the same10 Feb 2026US 12,545,425 B2Airbus SAS
- Sensor module6 Aug 2026US 2026/0227225 A1Hosiden Corporation
- Apparatus for optical liquid sensing in refillable articles for aerosol provision systems30 Jul 2026US 2026/0219091 A1Nicoventures Trading Limited
- System and method for measuring container fill level9 Jul 2026US 2026/0194384 A1HF Scientific, Inc.
- Immersion detection system, immersion detection device and immersion detection method9 Jul 2026US 2026/0194385 A1NTT, Inc.
- Predicting runout times for agricultural material in a container25 Jun 2026US 2026/0177413 A1Precision Planting LLC
Most cited
By later US patents
- Method of sensing volume of loose material78US 9,829,364 B2Raven Industries, Inc. · 2017
- Measurement of material level in vessels72US 4,247,784 AEastman Kodak Company · 1981
- Attribute sensing processes70US 7,933,733 B2Whirlpool Corporation · 2011
- Optical adapter for a light-wave rangefinder56US 4,692,023 ATokyo Kagaku Kikai Kabushiki Kaisha · 1987
- System and method for measuring and monitoring overflow or wetness conditions in a washroom55US 7,814,582 B2Kimberly-Clark Worldwide, Inc. · 2010