Improvements in earth boring equipment,申请号GB19590020841-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	Improvements in earth boring equipment
摘要
申请公布号	GB899463(A)	申请公布日期	1962.06.20
申请号	GB19590020841	申请日期	1959.06.17
申请人	DOWTY ROTOL LIMITED	发明人	PITT ANGUS RAYFIELD;WOOD SIDNEY WILLIAM HENRY
分类号	E21B19/00	主分类号	E21B19/00
代理机构		代理人
主权项
地址

您可能感兴趣的专利

Method for erasing a flash memory cell or an array of such cells having improved erase coupling ratio

Method using a synthetic molecular spring device in a system for dynamically controlling a system property and a corresponding system thereof

Resistance variable memory device reducing word line voltage

Flash memory device capable of reduced programming time

Pointer based column selection techniques in non-volatile memories

Round housings for virtual computing systems with stylesheets

Multilayer capacitor array

Magnetic transfer master carrier and magnetic transfer method

Color image forming apparatus and control method thereof

Target substance sensor and method thereof using a photonic crystal

Liquid crystal displays using organic insulating material and manufacturing methods thereof

Liquid crystal panel with protrusions for narrowing gap between substrates thereof and method for manufacturing same

Liquid crystal display panel

Wireless communication device

Loading reduction device and method

Zoom lens and image pickup apparatus

Displaying apparatus

Object measuring device and method for use in the device

Diffuser for light from light source array and displays incorporating same

Polarizing plate protective film, polarizing plate, and liquid crystal display