F16N 21/06
Covering members for nipples, conduits or apertures
F16N21/06 (Covering members for nipples, conduits or apertures) appears on 27 US grants and 19 published applications in this corpus.
Search patents in F16N- Granted patents
- 27
- Published applications
- 19
- Assignees
- 23
- Inventors
- 45
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 2 |
| 2015 | 1 | 1 |
| 2016 | 1 | 2 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 3 | 2 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Grease filling apparatus for manual grease gun25 Aug 2026US 12,716,548 B2
- Oil tank access port cover for an aircraft engine oil system16 Jun 2026US 12,655,935 B2Pratt & Whitney Canada Corp.
- Filter retaining plug30 Jul 2024US 12,049,910 B2Hamilton Sundstrand Corporation
- Filter retaining plug13 Apr 2021US 10,975,894 B2Hamilton Sunstrand Corporation
- Lubricant supply device for linear guide apparatus, and linear guide apparatus21 May 2019US 10,294,993 B2Nsk Ltd.
- Grease Filling Apparatus For Manual Grease Gun18 Jun 2026US 2026/0168618 A1
- Oil tank access port cover for an aircraft engine oil system26 Mar 2026US 2026/0085785 A1Pratt & Whitney Canada Corp.
- Mechanical system having an oil sampling device4 Dec 2025US 2025/0369834 A1Airbus Helicopters
- Filter retaining plug24 Jun 2021US 2021/0190097 A1Hamilton Sundstrand Corporation
- Filter retaining plug10 Oct 2019US 2019/0309770 A1Hamilton Sundstrand Corporation
Most cited
By later US patents