A63B 21/028
Made of material having high internal friction
Official title: {made of material having high internal friction, e.g. rubber, steel wool, intended to be compressed (resistance provided by plastic deformable materials A63B21/00189)}
A63B21/028 (Made of material having high internal friction) appears on 283 US grants and 287 published applications in this corpus.
Search patents in A63B- Granted patents
- 283
- Published applications
- 287
- Assignees
- 109
- Inventors
- 460
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 11 | 0 |
| 1998 | 12 | 0 |
| 1999 | 2 | 0 |
| 2000 | 8 | 0 |
| 2001 | 12 | 0 |
| 2002 | 3 | 8 |
| 2003 | 2 | 8 |
| 2004 | 6 | 8 |
| 2005 | 1 | 6 |
| 2006 | 5 | 7 |
| 2007 | 4 | 6 |
| 2008 | 1 | 2 |
| 2009 | 2 | 7 |
| 2010 | 3 | 7 |
| 2011 | 1 | 9 |
| 2012 | 5 | 8 |
| 2013 | 8 | 15 |
| 2014 | 3 | 12 |
| 2015 | 11 | 20 |
| 2016 | 15 | 18 |
| 2017 | 15 | 25 |
| 2018 | 13 | 17 |
| 2019 | 19 | 18 |
| 2020 | 21 | 16 |
| 2021 | 11 | 17 |
| 2022 | 16 | 18 |
| 2023 | 8 | 9 |
| 2024 | 8 | 10 |
| 2025 | 8 | 11 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Detection and elimination of macro viruses408US 5,978,917 ASymantec Corporation · 1999
- Simulator controlling device108US 5,713,794 ANamco Ltd. · 1998
- Sculpted weight for physical fitness routines91US 5,692,996 A1997
- Multifunctional exercise device74US 5,242,348 A1993
- Lower extremity rehabilitation and toning exercise apparatus and method72US 5,851,166 A1998