Controlling valve for oil wells,申请号US19300498819-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	Controlling valve for oil wells
摘要
申请公布号	US1844792(A)	申请公布日期	1932.02.09
申请号	US19300498819	申请日期	1930.11.28
申请人	PALMER ALBERT J	发明人	PALMER ALBERT J.
分类号	E21B35/00	主分类号	E21B35/00
代理机构		代理人
主权项
地址

您可能感兴趣的专利

高速机加工的方法与装置

漂白组合物

电视信号的多输入数字视频特辑处理机

无回收、无污染机械化小焦炉

电热腔雾化吸气射流式汽车节油器

制造超导体陶瓷的方法及其产品

分层包衣的微胶囊工艺

铁粒除氧剂配方及工艺

在一种带钢浇注设备中终止浇注工作的方法

Method for manufacturing a laminate by co-extrusion, and laminate.

Method of and plant for recovering useful products from a mixture of solid waste.

A staple cartridge and an anvilless surgical stapler.

Continuously variable transmission.

Method and apparatus for tranporting roving bobbins in a spinning factory.

Electronic controlled fluid suspension system.

Drop/insert processing circuit.

Method and apparatus for error reduction in the measurement of the spatial movement of points to be measured by means of ultrasonic signals.

Heat exchanger coils.

Method and device for treating surfaces of elongated objects.