A61M 16/0891
Closed circuit
Official title: {Closed circuit, e.g. for anaesthesia}
A61M16/0891 (Closed circuit) appears on 166 US grants and 271 published applications in this corpus.
Search patents in A61M- Granted patents
- 166
- Published applications
- 271
- Assignees
- 97
- Inventors
- 421
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 4 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 0 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 3 | 3 |
| 2011 | 4 | 2 |
| 2012 | 1 | 12 |
| 2013 | 0 | 11 |
| 2014 | 8 | 14 |
| 2015 | 7 | 17 |
| 2016 | 8 | 12 |
| 2017 | 11 | 16 |
| 2018 | 7 | 21 |
| 2019 | 13 | 19 |
| 2020 | 19 | 23 |
| 2021 | 18 | 24 |
| 2022 | 12 | 16 |
| 2023 | 15 | 21 |
| 2024 | 13 | 26 |
| 2025 | 11 | 14 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Absorption arrangement with a CO2 absorber and a water trap and process for filtering out CO218 Aug 2026US 12,708,734 B2Drägerwerk AG & Co. KGaA
- Supply device and process for supplying a patient-side coupling unit with a gas mixture11 Aug 2026US 12,702,783 B2Drägerwerk AG & Co. KGaA
- Coupling between drive and blower head2 Jun 2026US 12,642,927 B2Loewenstein Medical Technology S.A.
- Electronic vaporizer system and method of controlling the same26 May 2026US 12,636,461 B2GE Precision Healthcare LLC
- Portable anesthetic delivery device19 May 2026US 12,629,493 B2
- Device for supplying breating gas8 Oct 2026US 2026/0306770 A1Loewenstein Medical Technology S.A.
- A method of protecting turbine shaft bearings used in anaesthesia devices from contaminants in patient gases18 Jun 2026US 2026/0166247 A1Peninsula Medical Technologies Ltd
- Device for performing hypoxia training4 Jun 2026US 2026/0151586 A1
- Inhalation System28 May 2026US 2026/0144949 A1General Biophysics LLC
- Anesthesia system and process for controlling gas quantities in an anesthesia system14 May 2026US 2026/0131092 A1Drägerwerk AG & Co. KGaA
Most cited
By later US patents
- Conduit with heated wick71US 6,662,802 B2Fisher & Paykel Healthcare Limited · 2003
- Bymixer apparatus and method for fast-response, adjustable measurement of mixed gas fractions in ventilation circuits57US 7,793,659 B2The Regents of the University of California · 2010
- Conduit with heated wick52US 8,037,882 B2Fisher & Paykel Healthcare Limited · 2011
- Method and apparatus for controlling a medical anesthesia delivery system36US 5,806,513 AOhmeda Inc. · 1998
- Conduit with heated wick35US 7,559,324 B2Fisher & Paykel Healthcare Limited · 2009