E21C 29/12
Machines propelled by thrust or pull against a part alternately anchored to
Official title: Machines propelled by thrust or pull against a part alternately anchored to and released from a cable or chain
E21C29/12 (Machines propelled by thrust or pull against a part alternately anchored to) appears on 2 US grants and 0 published applications in this corpus.
Search patents in E21C- Granted patents
- 2
- Published applications
- 0
- Assignees
- 2
- Inventors
- 6
- Latest grant
- 6 Sep 1988
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
By publication year. Applications have been published since 2001.
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