B26B 21/4087
Usage or wear indication
Official title: {Usage or wear indication}
B26B21/4087 (Usage or wear indication) appears on 76 US grants and 100 published applications in this corpus.
Search patents in B26B- Granted patents
- 76
- Published applications
- 100
- Assignees
- 26
- Inventors
- 195
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 4 |
| 2003 | 1 | 2 |
| 2004 | 2 | 2 |
| 2005 | 2 | 0 |
| 2006 | 3 | 0 |
| 2007 | 0 | 3 |
| 2008 | 1 | 4 |
| 2009 | 0 | 4 |
| 2010 | 1 | 2 |
| 2011 | 0 | 2 |
| 2012 | 2 | 4 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 2 |
| 2017 | 0 | 5 |
| 2018 | 0 | 4 |
| 2019 | 1 | 12 |
| 2020 | 6 | 12 |
| 2021 | 8 | 7 |
| 2022 | 9 | 7 |
| 2023 | 3 | 8 |
| 2024 | 7 | 5 |
| 2025 | 3 | 7 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Intelligent shaving system having sensors18 Aug 2026US 12,709,036 B2
- Monitoring usage of a hair cutting device7 Jul 2026US 12,673,440 B2Koninklijke Philips N. V.
- Tactile wear indicator for a cutting element21 Apr 2026US 12,605,856 B2Koninklijke Philips N. V.
- Intelligent shaving system having sensors21 Apr 2026US 12,605,857 B2
- Machine learning for a personal care device25 Nov 2025US 12,479,118 B2Edgewell Personal Care Brands, LLC
- Determining a wear level of a treatment head of a personal care device4 Jun 2026US 2026/0151927 A1Koninklijke Philips N. V.
- Shaving and Grooming Apparatus5 Feb 2026US 2026/0034692 A1
- Intelligent shaving system having sensors25 Dec 2025US 2025/0387936 A1
- Intelligent shaving system having sensors11 Dec 2025US 2025/0375908 A1
- Intelligent shaving system having sensors16 Oct 2025US 2025/0319619 A1
Most cited
By later US patents
- Shaving system69US 7,100,283 B12006
- Shaving system with improved guard structure58US 5,711,076 AThe Gillette Company · 1998
- Shaving system with improved guard structure47US 5,915,791 AThe Gillette Company · 1999
- Shaving razors and razor cartridges45US 6,868,610 B2The Gillette Company · 2005
- Wear indicator for a disposable razor41US 5,388,331 A1995