F04B 41/02
Pumping installations or systems specially adapted for elastic fluids: having reservoirs
Official title: having reservoirs
F04B41/02 (Pumping installations or systems specially adapted for elastic fluids: having reservoirs) appears on 473 US grants and 572 published applications in this corpus.
Search patents in F04B- Granted patents
- 473
- Published applications
- 572
- Assignees
- 260
- Inventors
- 942
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 6 | 5 |
| 2003 | 8 | 11 |
| 2004 | 6 | 19 |
| 2005 | 4 | 9 |
| 2006 | 11 | 23 |
| 2007 | 3 | 13 |
| 2008 | 5 | 14 |
| 2009 | 5 | 19 |
| 2010 | 8 | 16 |
| 2011 | 13 | 15 |
| 2012 | 18 | 22 |
| 2013 | 9 | 27 |
| 2014 | 17 | 16 |
| 2015 | 15 | 35 |
| 2016 | 19 | 34 |
| 2017 | 15 | 28 |
| 2018 | 31 | 47 |
| 2019 | 40 | 34 |
| 2020 | 35 | 34 |
| 2021 | 36 | 24 |
| 2022 | 22 | 27 |
| 2023 | 30 | 38 |
| 2024 | 24 | 26 |
| 2025 | 33 | 22 |
| 2026 | 8 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas compression system and control method thereof25 Aug 2026US 12,716,410 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Systems and apparatuses for portable air distribution28 Jul 2026US 12,692,854 B2Studsvik, Inc.
- Pneumatic energy generation device14 Jul 2026US 12,678,936 B2Industry-Academic Cooperation Foundation, Yonsei University
- Power usage planning system and method for vehicle air compressor30 Jun 2026US 12,669,116 B2
- Cleaning device16 Jun 2026US 12,654,204 B2Greenworks (Jiangsu) Co., Ltd.
- Compressor unit6 Aug 2026US 2026/0226891 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Near-isothermal gas compressor and/or /expander system30 Jul 2026US 2026/0218693 A1University of Virginia Patent Foundation
- Compressor unit30 Jul 2026US 2026/0218700 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Air compression device2 Jul 2026US 2026/0185514 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Compression system18 Jun 2026US 2026/0168483 A1Universite Du Luxembourg
Most cited
By later US patents
- Portable, battery-powered air compressor for a pneumatic tool system1,047US 7,225,959 B2Black & Decker Inc. · 2007
- Method and apparatus for compressing gases109US 4,515,516 AChampion, Perrine & Associates · 1985
- Method and apparatus for compressing gases with a liquid system96US 5,169,295 ATren Fuels, Inc. · 1992
- Power operated air compressor assembly75US 6,375,437 B1Stanley Fastening Systems, L.P. · 2002
- System and method for portable battery back-up sump pump73US 8,579,600 B2Sta-Rite Industries, Inc. · 2013