F15C
Fluid-circuit elements predominantly used for computing or control purposes
Official title: FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES (transducers F15B5/00, {F15B21/00}; fluid dynamics in general F15D; computer comprising fluid elements G06D, G06G; {electric control by means of electro-hydraulic or electro-pneumatic amplifiers G05B7/02})
F15C (Fluid-circuit elements predominantly used for computing or control purposes) appears on 1,045 US grants and 487 published applications in this corpus.
Search patents in F15C- Granted patents
- 1,045
- Published applications
- 487
- Assignees
- 453
- Inventors
- 1,478
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 22 | 0 |
| 1978 | 30 | 0 |
| 1979 | 17 | 0 |
| 1980 | 30 | 0 |
| 1981 | 34 | 0 |
| 1982 | 16 | 0 |
| 1983 | 13 | 0 |
| 1984 | 16 | 0 |
| 1985 | 20 | 0 |
| 1986 | 15 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 18 | 0 |
| 1990 | 13 | 0 |
| 1991 | 17 | 0 |
| 1992 | 12 | 0 |
| 1993 | 21 | 0 |
| 1994 | 24 | 0 |
| 1995 | 17 | 0 |
| 1996 | 14 | 0 |
| 1997 | 19 | 0 |
| 1998 | 23 | 0 |
| 1999 | 44 | 0 |
| 2000 | 37 | 0 |
| 2001 | 35 | 16 |
| 2002 | 39 | 47 |
| 2003 | 40 | 42 |
| 2004 | 45 | 36 |
| 2005 | 25 | 47 |
| 2006 | 48 | 25 |
| 2007 | 19 | 29 |
| 2008 | 18 | 27 |
| 2009 | 16 | 11 |
| 2010 | 16 | 22 |
| 2011 | 19 | 15 |
| 2012 | 20 | 19 |
| 2013 | 15 | 16 |
| 2014 | 20 | 22 |
| 2015 | 18 | 11 |
| 2016 | 12 | 14 |
| 2017 | 18 | 11 |
| 2018 | 12 | 10 |
| 2019 | 14 | 10 |
| 2020 | 11 | 18 |
| 2021 | 20 | 8 |
| 2022 | 13 | 7 |
| 2023 | 7 | 7 |
| 2024 | 10 | 8 |
| 2025 | 6 | 6 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F15C 5/00Manufacture of fluid circuit elements453
- F15C 1/00Circuit elements having no moving parts435
- F15C 3/00Circuit elements having moving parts208
- F15C 4/00Circuit elements characterised by their special functions34
- F15C 7/00Hybrid elements, i.e. circuit elements having features according to groups f15c1/00 and11
Recent patents
- Multi-head fluidic oscillators4 Aug 2026US 12,698,623 B2Kohler Co.
- Powder protecting three-way valve with cylindrical heating element14 Apr 2026US 12,601,411 B2Aotech Co.,Ltd.
- Material flow amplifier16 Dec 2025US 12,497,981 B2Vortex Pipe Systems LLC
- Fluid flow control system employing a fluidic diode for control pressure2 Dec 2025US 12,486,739 B2Halliburton Energy Services.Inc.
- Variable characteristics fluidic oscillator and fluidic oscillator with three dimensional output jet and associated methods28 Oct 2025US 12,453,977 B2Ohio State Innovation Foundation
- Swirling flow generating device that can change the rotation direction periodically2 Jul 2026US 2026/0185550 A1Roketsan Roket Sanayii Ticaret A. S.
- Sheet-based fluidic diodes for embedded fluidic circuitry in soft devices16 Apr 2026US 2026/0104065 A1William Marsh Rice University
- Fluid flow control system employing a fluidic diode for control pressure19 Feb 2026US 2026/0049540 A1Halliburton Energy Services.Inc.
- Supersonic fluidic oscillator and method of controlling a superplastic forming process24 Jul 2025US 2025/0235918 A1Aem Power Systems Inc.
- Household appliance apparatus5 Jun 2025US 2025/0178002 A1LIXIL Corporation
Most cited
By later US patents
- Microfabricated elastomeric valve and pump systems619US 6,408,878 B1California Institute of Technology · 2002
- Methods and apparatus for analyzing polynucleotide sequences612US 6,818,395 B1California Institute of Technology · 2004
- Parallel reaction cassette and associated devices590US 5,863,502 ASarnoff Corporation · 1999
- Methods and apparatus for analyzing polynucleotide sequences567US 6,911,345 B2California Institute of Technology · 2005
- Moving microdroplets561US 6,130,098 AThe Regents of the University of Michigan · 2000