F04C 2/20
With dissimilar tooth forms
Official title: with dissimilar tooth forms (F04C2/16 takes precedence)
F04C2/20 (With dissimilar tooth forms) appears on 16 US grants and 10 published applications in this corpus.
Search patents in F04C- Granted patents
- 16
- Published applications
- 10
- Assignees
- 7
- Inventors
- 23
- Latest grant
- 29 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
Most cited
By later US patents
- Rotary positive-displacement scavenging device for rotary vane pumping machine31US 6,244,240 B1Mallen Research Limited Partnership · 2001
- Gear pump28US 7,479,000 B2M&M Technologies, Inc. · 2009
- External gear pump with drive gear seal19US 6,171,089 B2Parker-Hannifin Corporation · 2001
- Cavitation-free gear pump12US 6,123,533 ADana Corporation · 2000
- Cam-gear pump-compressor apparatus7US 5,246,358 A1993