Rotary oil well drill bit,申请号US19380186884-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	Rotary oil well drill bit
摘要
申请公布号	US2130639(A)	申请公布日期	1938.09.20
申请号	US19380186884	申请日期	1938.01.25
申请人	FOSTER CLIFFORD R	发明人	FOSTER CLIFFORD R.
分类号	E21B10/32	主分类号	E21B10/32
代理机构		代理人
主权项
地址

您可能感兴趣的专利

CHEMICAL MECHANICAL POLISHING METHOD

APPARATUS FOR OPENING AND CLOSING SUCTION AND DISCHARGE HOLES OF AIR CONDITIONER

AIR CONDITIONER WITH STERILIZATION FUNCTION

BALANCE YOKE FOR MOUNTED INSULATOR DEVICE

FEEDING CARRIER OF IMAGE CHECKING DEVICE HAVING TRACTION DEVICE

METHOD FOR CONTROLLING DIRECTION OF WIND OF AIR CONDITIONER

THIN FILM TRANSISTOR SUBSTRATE FOR LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME

CASH MEMORY SYSTEM WITH IDENTICAL ENTRY NUMBERS WHEN CHANGE IN DATA LINE SIZE OCCURS

CLEANING APPARATUS FOR SEMICONDUCTOR WAFER

RESISTOR FOR CONTROLLING APPARATUS OF VENTILATOR

DRIVING SYSTEM OF LCD AND DRIVING METHOD OF LIQUID CRYSTAL PANEL

PHOTO ETCHING METHOD FOR THIN FILM AND FABRICATION METHOD OF THIN FILM TRANSISTOR FOR LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME

DRY ETCHING UNIT HAVING PRESSURE CONTROL VARIABLE VALVE

HEALTH BICYCLE CAPABLE OF DATA COMMUNICATION WITH COMPUTER

METHOD AND APPARATUS FOR QUANTITATIVE DISPENSING OF LIQUID

PARTIAL MOVING INJECTION NOZZLE SYSTEM FOR WATER-JET LOOM

TROWEL WITH HOE INSTALLATION FLAP

DEPOSITION APPARATUS FOR FABRICATION OF SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING HEMISPHERICAL PARTICLE FILM USING DEPOSITION APPARATUS

ROASTING DEVICE USING YELLOW SOIL

ROTATABLE TRANSFER GUIDE OF AN APPARATUS FOR AUTOMATICALLY SELECTING/TRANSFERRING INNER CAPS FOR CONTAINERS