E21D 23/003
Consisting of a rigid pile
Official title: {consisting of a rigid pile}
E21D23/003 (Consisting of a rigid pile) appears on 3 US grants and 0 published applications in this corpus.
Search patents in E21D- Granted patents
- 3
- Published applications
- 0
- Assignees
- 3
- Inventors
- 4
- Latest grant
- 14 Mar 1989
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 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 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Movable consolidating trestle for securing the excavating edge14 Mar 1989US 4,812,081 AVoest-Alpine Aktiengesellschaft
- Support systems for mineral mining installations11 Mar 1980US 4,192,632 AGewerkschaft Eisenhutte Westfalia
- Self advancing support chocks16 Nov 1976US 3,991,579 AMines de Potasse d'Alsace S.A.
No published applications in this class yet.
Most cited
By later US patents