E01B 2202/044
Rolling
E01B2202/044 (Rolling) appears on 20 US grants and 10 published applications in this corpus.
Search patents in E01B- Granted patents
- 20
- Published applications
- 10
- Assignees
- 17
- Inventors
- 49
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 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 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 4 |
| 2021 | 0 | 2 |
| 2022 | 3 | 0 |
| 2023 | 0 | 0 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Switch point roller assembly15 Jul 2025US 12,359,377 B1voestalpine Railway Systems Nortrak LLC
- Turnout apparatus for overhead monorail1 Oct 2024US 12,104,328 B2Taiyuan University of Technology
- Switch for track of maglev train10 Sep 2024US 12,084,815 B2Crrc Qingdao Sifang Co., Ltd.
- Switch device15 Nov 2022US 11,499,271 B2Voestalpine Bwg GmbH & Co. KG
- Device for moving a tongue rail of a switch20 Sep 2022US 11,447,917 B2Wieland Austria Ges.M.B.H.
- Switch Point Roller Assembly16 Oct 2025US 2025/0320668 A1voestalpine Railway Systems Nortrak LLC
- Turnout apparatus for overhead monorail16 Dec 2021US 2021/0388562 A1Taiyuan University of Technology
- Switch for track of maglev train10 Jun 2021US 2021/0172123 A1Crrc Qingdao Sifang Co., Ltd.
- Device for moving a tongue rail of a gate10 Dec 2020US 2020/0385932 A1Wieland Austria Ges.M.B.H.
- Device for moving a tongue rail of a switch10 Dec 2020US 2020/0385933 A1Wieland Austria Ges.M.B.H.
Most cited
By later US patents
- Railroad spring frog12US 5,544,848 AABC Rail Products Corporation · 1996
- Switch point roller assist apparatus11US 5,501,418 A1996
- Switch blade rolling device11US 5,628,480 AEco Production Vresova, SPOL. S.R.O. · 1997
- Roller assembly for a switch tongue used with a stock rail7US 5,390,881 ABWG Butzbacher Weichenbau GmbH · 1995
- Railroad track switch7US 5,509,626 AEnzesfeld-Caro Metallwerke AG · 1996