F02G 2242/30
Having variable working volume
Official title: having variable working volume
F02G2242/30 (Having variable working volume) appears on 4 US grants and 1 published applications in this corpus.
Search patents in F02G- Granted patents
- 4
- Published applications
- 1
- Assignees
- 2
- Inventors
- 7
- Latest grant
- 27 Jan 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- External-combustion, closed-cycle thermal engine27 Jan 2015US 8,938,942 B2Yokohama Seiki Co., Ltd.
- Regenerative internal combustion engine29 May 1990US 4,928,658 A
- Combined internal combustion and hot gas engine23 Jan 1990US 4,894,995 A
- Regenerative internal combustion engine13 Dec 1988US 4,790,284 ARegenic Corporation
Most cited
By later US patents
- Regenerative internal combustion engine28US 4,928,658 A1990
- Regenerative internal combustion engine22US 4,790,284 ARegenic Corporation · 1988
- Combined internal combustion and hot gas engine2US 4,894,995 A1990
- External-combustion, closed-cycle thermal engine1US 8,938,942 B2Yokohama Seiki Co., Ltd. · 2015