| 发明名称 |
Tool joint |
| 摘要 |
|
| 申请公布号 |
US2440651(A) |
申请公布日期 |
1948.04.27 |
| 申请号 |
US19430502899 |
申请日期 |
1943.09.18 |
| 申请人 |
CONTINENTAL OIL COMPANY |
发明人 |
BELL ALEXANDER H. |
| 分类号 |
E21B17/042;F16L15/08 |
主分类号 |
E21B17/042 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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CEINTURE DE SOUTIEN LOMBAIRE ET ABDOMINAL POUR HOMME OU FEMME
TRANSFERT SECURISE ENTRE MEMOIRE NON-VOLATILE ET MEMOIRE VOLATILE
DISPOSITIF MODULAIRE POUR LA TRANSMISSION SANS FIL DE DONNEES
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