Signaling means for rotary oil well drilling apparatus,申请号US19320615089-传众专利搜索

首页产品黄页商标征信

会员服务注册登录

法人/股东/高管

发明名称	Signaling means for rotary oil well drilling apparatus
摘要
申请公布号	US1891330(A)	申请公布日期	1932.12.20
申请号	US19320615089	申请日期	1932.06.03
申请人	NATIONAL OIL DRILL CORPORATION	发明人	COMPTE EDWARD J. LE;HARRISSON CARTER A.
分类号	E21B44/00	主分类号	E21B44/00
代理机构		代理人
主权项
地址

您可能感兴趣的专利

瓶帖(芦笋酱油)

食品包装盒

Scraper blade for primary belt scraper

Childproof container for a blister pack

Connection device for track chain link

AGENT FOR USE IN THE PREVENTION AND TREATMENT OF DISORDERS ASSOCIATED WITH VARIOUS TYPES OF AGEING

Device for thawing and/or warming of medical infusion or transfusion material in a container

Doll's clothing

Radiation sensitive composition

Inverter for a gas discharge lamp with stepwise variable frequencies

Image processing method and apparatus, and recording medium

Extending the life of incandescent lamps

Pack of objects wrapped in a plastic film, plastic film for such a pack, and method of manufacturing such a plastic film

Volumetric infusion pump

Method of forming a trench isolation structure utilizing composite oxide films

Heated laminated windshield, in particular for aircraft cockpit