E21D 23/083
Acting on a firm abutment adapted thereto
Official title: {acting on a firm abutment adapted thereto}
E21D23/083 (Acting on a firm abutment adapted thereto) appears on 4 US grants and 0 published applications in this corpus.
Search patents in E21D- Granted patents
- 4
- Published applications
- 0
- Assignees
- 3
- Inventors
- 12
- Latest grant
- 2 Jul 1985
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Mine roof support assembly2 Jul 1985US 4,526,495 AGewerkschaft Eisenhutte Westfalia
- Mine-roof support19 Apr 1983US 4,380,410 AHermann Hemscheidt Maschinenfabrik GmbH & Co.
- Mine roof support assembly22 Jan 1980US 4,184,791 AGewerkschaft Eisenhutte Westfalia
- Shield-type support assemblies for mine workings28 Feb 1978US 4,075,857 AGewerkschaft Eisenhutte Westfalia
No published applications in this class yet.
Most cited
By later US patents
- Mine roof support assembly8US 4,526,495 AGewerkschaft Eisenhutte Westfalia · 1985
- Mine-roof support3US 4,380,410 AHermann Hemscheidt Maschinenfabrik GmbH & Co. · 1983
- Shield-type support assemblies for mine workings2US 4,075,857 AGewerkschaft Eisenhutte Westfalia · 1978
- Mine roof support assembly2US 4,184,791 AGewerkschaft Eisenhutte Westfalia · 1980