E21D 9/118
With independently driven central head
Official title: {with independently driven central head}
E21D9/118 (With independently driven central head) appears on 1 US grants and 0 published applications in this corpus.
Search patents in E21D- Granted patents
- 1
- Published applications
- 0
- Assignees
- 1
- Inventors
- 2
- Latest grant
- 29 Jan 1980
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| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
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