A61M 1/3669
Electrical impedance measurement of body fluids
Official title: {Electrical impedance measurement of body fluids; transducers specially adapted therefor}
A61M1/3669 (Electrical impedance measurement of body fluids) appears on 74 US grants and 50 published applications in this corpus.
Search patents in A61M- Granted patents
- 74
- Published applications
- 50
- Assignees
- 34
- Inventors
- 94
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 0 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 2 |
| 2003 | 3 | 6 |
| 2004 | 1 | 4 |
| 2005 | 4 | 2 |
| 2006 | 3 | 3 |
| 2007 | 1 | 4 |
| 2008 | 1 | 0 |
| 2009 | 3 | 2 |
| 2010 | 3 | 4 |
| 2011 | 1 | 3 |
| 2012 | 3 | 2 |
| 2013 | 1 | 2 |
| 2014 | 3 | 1 |
| 2015 | 1 | 0 |
| 2016 | 2 | 2 |
| 2017 | 1 | 0 |
| 2018 | 2 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 4 |
| 2021 | 1 | 2 |
| 2022 | 4 | 1 |
| 2023 | 0 | 1 |
| 2024 | 3 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Flow sensor and method of measuring a flow24 Jun 2025US 12,339,151 B2Fresenius Medical Care Deutschland GmbH
- Systems and methods for measuring electrical characteristic of medical fluids15 Apr 2025US 12,276,628 B2Fresenius Medical Care Holdings, Inc.
- Sensor and apparatus for determining at least one parameter of blood circulating in an extracorporeal blood circuit9 Jul 2024US 12,029,555 B2Gambro Lundia AB
- Systems and methods for measuring electrical characteristic of medical fluids23 Jan 2024US 11,879,860 B2Fresenius Medical Care Holdings, Inc.
- Leakage current management systems, devices, and methods2 Jan 2024US 11,860,197 B2NxStage Medical, Inc.
- Apparatus, sensor and process for determining at least one parameter of blood circulating in an extracorporeal blood circuit24 Oct 2024US 2024/0350040 A1Gambro Lundia AB
- Systems and methods for measuring electrical characteristic of medical fluids22 Feb 2024US 2024/0060924 A1Fresenius Medical Care Holdings, Inc.
- Flow sensor and method of measuring a flow16 Mar 2023US 2023/0084231 A1Fresenius Medical Care Deutschland GmbH
- Leakage Current Management Systems, Devices, and Methods23 Jun 2022US 2022/0196708 A1NxStage Medical, Inc.
- Fluid leak detection in a dialysis machine22 Apr 2021US 2021/0113759 A1Fresenius Medical Care Holdings, Inc.
Most cited
By later US patents
- Disposable, pre-calibrated, pre-validated sensors for use in bio-processing applications482US 8,506,162 B2Parker-Hannifin Corporation · 2013
- Autologous blood recovery membrane system and method473US 5,055,198 A1991
- Implantable device and method for removing fluids from the blood of a patient method for implanting such a device and method for treating a patient experiencing renal failure329US 5,902,336 AMirimedical LLC · 1999
- Cardiovascular measurements by sound velocity dilution206US 5,453,576 ATransonic Systems, Inc. · 1995
- Method and apparatus for separation of blood into its components168US 5,298,171 AFresenius AG · 1994