E21D 15/007
Spark-reducing
Official title: {spark-reducing}
E21D15/007 (Spark-reducing) appears on 1 US grants and 0 published applications in this corpus.
Search patents in E21D- Granted patents
- 1
- Published applications
- 0
- Assignees
- 0
- Inventors
- 3
- Latest grant
- 11 Mar 1980
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| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
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