F01C 1/04
Of internal-axis type
Official title: of internal-axis type
F01C1/04 (Of internal-axis type) appears on 42 US grants and 37 published applications in this corpus.
Search patents in F01C- Granted patents
- 42
- Published applications
- 37
- Assignees
- 15
- Inventors
- 51
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 3 |
| 2013 | 3 | 4 |
| 2014 | 2 | 4 |
| 2015 | 3 | 3 |
| 2016 | 4 | 2 |
| 2017 | 3 | 1 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 2 | 3 |
| 2021 | 3 | 4 |
| 2022 | 3 | 1 |
| 2023 | 2 | 2 |
| 2024 | 2 | 2 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Rotational engine with inner and outer rings7 Oct 2025US 12,435,632 B2Duplicent, LLC
- Rotary combustion engine block sealing18 Mar 2025US 12,252,990 B2
- Rotational engine with inner and outer rings24 Sep 2024US 12,098,641 B2Duplicent, LLC
- Sealing in helical trochoidal rotary machines21 May 2024US 11,988,208 B2Rotoliptic Technologies Incorporated
- Rotational engine with inner and outer rings4 Apr 2023US 11,619,133 B2Duplicent, LLC
- Rotational engine with inner and outer rings31 Jul 2025US 2025/0243759 A1Duplicent, LLC
- Sealing In Helical Trochoidal Rotary Machines22 Aug 2024US 2024/0280099 A1Rotoliptic Technologies Incorporated
- Rotational engine with inner and outer rings2 May 2024US 2024/0141789 A1Duplicent, LLC
- Rotary Combustion Engine Block Sealing10 Aug 2023US 2023/0250722 A1
- Sealing In Helical Trochoidal Rotary Machines30 Mar 2023US 2023/0098259 A1Rotoliptic Technologies Incorporated
Most cited
By later US patents
- Displacement type fluid machine having rotation suppression of an orbiting displacer48US 6,152,714 AHitachi, Ltd. · 2000
- Cycloid rotor engine32US 8,523,546 B2LiquidPiston, Inc. · 2013
- IDAR-ACE inverse displacement asymmetric rotating alternative core engine16US 8,714,135 B2Lumenium LLC · 2014
- Rotary positive displacement machine for incompressible media11US 5,011,386 AGutag Innovations AG · 1991
- Helical trochoidal rotary machines with offset10US 10,837,444 B2Rotoliptic Technologies Incorporated · 2020