首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
Drawworks
摘要
申请公布号
US2650064(A)
申请公布日期
1953.08.25
申请号
US19490097055
申请日期
1949.06.03
申请人
THE NATIONAL SUPPLY COMPANY
发明人
PICARD JOHN B.
分类号
E21B3/06
主分类号
E21B3/06
代理机构
代理人
主权项
地址
您可能感兴趣的专利
POWER MODULE
TIME MANAGEMENT DEVICE
READER AND SYSTEM FOR NONCONTACT CARD
CARD RECOVERING MACHINE
RECEPTION INFORMING SYSTEM FOR ELECTRONIC MAIL, AND RECEPTION INFORMING METHOD FOR ELECTRONIC MAIL
IMAGE PROCESSOR, IMAGE PROCESSING METHOD AND PROVIDING MEDIUM
CELL EXCHANGE MODULE, TRANSMISSION EQUIPMENT AND ACTIVE/ RESERVE SWITCHING METHOD FOR THE EQUIPMENT
ELECTRONIC MAIL DEVICE AND RECORDING MEDIUM RECORDED WITH ELECTRONIC MAIL PROGRAM
COMMUNICATION METHOD AND COMMUNICATION INTERFACE DEVICE
SERVICE ATTRIBUTE ASSIGNMENT METHOD AND NETWORK DEVICE
METHOD AND SYSTEM FOR SCHEDULING IN EXCHANGE SYSTEM
PLANT MONITORING DEVICE AND SYSTEM
POSITIVE CHARGE TYPE BLACK TONER, CYAN TONER, MAGENTA TONER AND YELLOW TONER FOR TWO-COMPONENT DEVELOPMENT AND ELECTROPHOTOGRAPHIC DEVELOPER USING SAME
LAMP FOR VEHICLE
LIQUID CRYSTAL DEVICE
LIQUID CRYSTAL DISPLAY DEVICE
COLOR LIQUID CRYSTAL DISPLAY PANEL AND ITS PRODUCTION
WAFER HOUSING DEVICE AND WAFER HOUSING METHOD
SEMICONDUCTOR DEVICE
SEMICONDUCTOR DEVICE
