F03B 15/08
By speed
Official title: by speed, e.g. by measuring electric frequency or liquid flow
F03B15/08 (By speed) appears on 59 US grants and 57 published applications in this corpus.
Search patents in F03B- Granted patents
- 59
- Published applications
- 57
- Assignees
- 35
- Inventors
- 117
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 5 |
| 2013 | 1 | 2 |
| 2014 | 1 | 6 |
| 2015 | 3 | 1 |
| 2016 | 2 | 6 |
| 2017 | 1 | 5 |
| 2018 | 3 | 7 |
| 2019 | 6 | 3 |
| 2020 | 6 | 6 |
| 2021 | 10 | 4 |
| 2022 | 1 | 3 |
| 2023 | 3 | 0 |
| 2024 | 3 | 3 |
| 2025 | 2 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Equalization tank assemblies for wastewater systems10 Feb 2026US 12,546,280 B2Trane International Inc.
- Variable speed reconfigurable pump/turbine clusters6 May 2025US 12,292,026 B2Flowserve Pte. Ltd.
- Method and system for calculating stability margin domain of control parameters of hydraulic turbine regulating system14 Jan 2025US 12,196,174 B1Huazhong University of Science and Technology
- Method and device for determining suction height of variable speed units1 Oct 2024US 12,104,566 B2China Three Gorges Corporation
- Hydroelectric power generation system5 Mar 2024US 11,920,553 B2Daikin Industries, Ltd.
- Multi-input electrical energy storage system and method1 Oct 2026US 2026/0302802 A1
- Aquaculture net cleaner head controller10 Sep 2026US 2026/0262613 A1Lindgren-Pitman, Inc.
- Equalization tank assemblies for wastewater systems22 May 2025US 2025/0163881 A1Trane International Inc.
- Remote-controlled modular hydropower generator system13 Mar 2025US 2025/0084822 A1
- Hydroelectric turbine installation and operation method for enhancing the level of dissolved oxygen16 May 2024US 2024/0159209 A1Voith Patent GmbH
Most cited
By later US patents
- Cushioned dual-action constant speed wave power generator62US 5,424,582 AElektra Power Industries, Inc. · 1995
- Method and apparatus for control of a turbine generator50US 4,496,845 ACla-Val Co. · 1985
- Method and apparatus for controlling variable-speed hydraulic power generating system41US 4,625,125 AHitachi, Ltd. · 1986
- Control apparatus for variable-speed hydraulic power generating system35US 4,754,156 AHitachi, Ltd. · 1988
- Method and apparatus for optimizing performance of a kaplan turbine30US 5,754,446 AVoith Hydro, Inc. · 1998