E21C 25/145
Cowls
Official title: {Cowls}
E21C25/145 (Cowls) appears on 5 US grants and 0 published applications in this corpus.
Search patents in E21C- Granted patents
- 5
- Published applications
- 0
- Assignees
- 5
- Inventors
- 5
- Latest grant
- 7 May 1991
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of indirect measurement of cowl position on a longwall shearer7 May 1991US 5,013,091 AConsolidation Coal Company
- Apparatus for use with cutting drums of mineral machines21 Jun 1983US 4,389,073 AGewerkschaft Eisenhutte Westfalia
- Cowl assembly for longwall mining machine31 Aug 1982US 4,346,939 AGerb. Eickhoff Machinenfabrik und Eisengiesserei m.b.H.
- Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine17 Feb 1981US 4,251,112 AGeb. Eickhoff Maschinenfabrik und Eisengiesserei m.b.H.
- Equipment for laying elongate material8 Apr 1980US 4,196,935 ACoal Industry (Patents) Limited
No published applications in this class yet.
Most cited
By later US patents
- Equipment for laying elongate material5US 4,196,935 ACoal Industry (Patents) Limited · 1980
- Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine4US 4,251,112 AGeb. Eickhoff Maschinenfabrik und Eisengiesserei m.b.H. · 1981
- Cowl assembly for longwall mining machine4US 4,346,939 AGerb. Eickhoff Machinenfabrik und Eisengiesserei m.b.H. · 1982
- Method of indirect measurement of cowl position on a longwall shearer1US 5,013,091 AConsolidation Coal Company · 1991