E01B 7/12
Fixed frogs made of one part or composite
E01B7/12 (Fixed frogs made of one part or composite) appears on 16 US grants and 13 published applications in this corpus.
Search patents in E01B- Granted patents
- 16
- Published applications
- 13
- Assignees
- 21
- Inventors
- 46
- Latest grant
- 26 Nov 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 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 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Special trackwork assembly26 Nov 2019US 10,487,456 B2Polycorp Ltd.
- Double frog for track crossings8 Nov 2016US 9,487,920 B2Voestalpine Vae GmbH
- Special track assembly and methods of making same6 May 2014US 8,714,462 B1Polycorp Ltd.
- Grooved rail core piece18 Dec 2007US 7,309,050 B2BWG GmbH & Co. KG
- Railroad crossing apparatus having improved rail connection and improved flangeway floor geometry and method incorporating the same7 Feb 2006US 6,994,299 B2CMI-Promex, Inc.
- Points or crossing component with releasable connection and method and arrangement for monitoring the releasable connection1 Jan 2026US 2026/0001579 A1Voestalpine Railway Systems GmbH
- Core-inlaid high manganese steel frog structure8 Nov 2018US 2018/0320322 A1Shandong Yuanda Special Material Polytron Technologies Inc
- Special Trackwork Assembly6 Jul 2017US 2017/0191225 A1Polycorp Ltd.
- Manufacturing method of producing frog and crossing assemblies for overhead contact systems14 Jan 2016US 2016/0010286 A1AFL Telecommunications LLC
- Double frog for track crossings1 Jan 2015US 2015/0001350 A1Voestalpine Vae GmbH
Most cited
By later US patents
- Railway frog wear component10US 6,732,980 B2Progress Rail Services Corporation · 2004
- Frog insert and assembly and method for making frog assembly9US 6,266,866 B1VAE Nortak North America Inc. · 2001
- Railroad crossing apparatus having improved rail connection and improved flangeway floor geometry and method incorporating the same7US 6,994,299 B2CMI-Promex, Inc. · 2006
- Method of joining frogs of wear-resisting manganese steel castings to rails of carbon steel6US 4,169,745 AVereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellschaft · 1979
- Rail section6US 5,522,570 ABWG Butzbacher Weichenbau GmbH · 1996