H02N 3/00
Generators in which thermal or kinetic energy is converted into electrical energy
Official title: Generators in which thermal or kinetic energy is converted into electrical energy by ionisation of a fluid and removal of the charge therefrom (discharge tubes functioning as thermionic generators H01J45/00)
H02N3/00 (Generators in which thermal or kinetic energy is converted into electrical energy) appears on 135 US grants and 142 published applications in this corpus.
Search patents in H02N- Granted patents
- 135
- Published applications
- 142
- Assignees
- 92
- Inventors
- 289
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 2 | 2 |
| 2006 | 1 | 3 |
| 2007 | 1 | 4 |
| 2008 | 3 | 0 |
| 2009 | 1 | 4 |
| 2010 | 2 | 4 |
| 2011 | 1 | 5 |
| 2012 | 2 | 9 |
| 2013 | 5 | 12 |
| 2014 | 8 | 7 |
| 2015 | 6 | 3 |
| 2016 | 4 | 7 |
| 2017 | 7 | 8 |
| 2018 | 7 | 8 |
| 2019 | 7 | 9 |
| 2020 | 2 | 11 |
| 2021 | 10 | 21 |
| 2022 | 8 | 9 |
| 2023 | 10 | 6 |
| 2024 | 10 | 3 |
| 2025 | 4 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Moisture enabled electric power generation materials and device31 Mar 2026US 12,592,654 B2The Hong Kong Polytechnic University
- Energy storage and conversion using fluid energy and electric field to create electric charge30 Sep 2025US 12,431,821 B2Ionech Limited
- Device for ambient thermal and vibration energy harvesting5 Aug 2025US 12,381,418 B2Board of Trustees of the University of Arkansas
- Energy generation and energy recycling1 Apr 2025US 12,267,025 B2City University of Hong Kong
- Device for converting thermal energy into electrical energy4 Feb 2025US 12,218,611 B2Fondazione Istituto Italiano Di Tecnologia
- Kinetic energy harvesting system7 May 2026US 2026/0128688 A1
- Device for ambient thermal and vibration energy harvesting20 Nov 2025US 2025/0357789 A1Board of Trustees of the University of Arkansas
- Heterogeneous graphene oxide wet generator and preparation method9 Oct 2025US 2025/0317076 A1Guangdong Morion Nanotech Co., Ltd.
- Device for transformation of thermal into electrical energy28 Nov 2024US 2024/0396474 A1Airbus Operations GmbH
- Multilayered ion exchange membranes11 Jul 2024US 2024/0230165 A1USA Fortescue IP, Inc.
Most cited
By later US patents
- Method and apparatus for a vacuum thermionic converter with thin film carbonaceous field emission74US 6,064,137 ABorealis Technical Limited · 2000
- Thermal diode for energy conversion66US 6,396,191 B1Eneco, Inc. · 2002
- Hybrid thermionic energy converter and method41US 6,489,704 B1Eneco, Inc. · 2002
- Apparatus and method of generating electricity from wind energy33US 4,146,800 A1979
- Thermionic-thermoelectric generator system and apparatus32US 4,368,416 AJames Laboratories, Inc. · 1983