发明名称 |
Drill pipe protector |
摘要 |
|
申请公布号 |
US2033592(A) |
申请公布日期 |
1936.03.10 |
申请号 |
US19350010844 |
申请日期 |
1935.03.13 |
申请人 |
SKEEN WALTER L |
发明人 |
SKEEN WALTER L. |
分类号 |
E21B17/10;E21B17/12 |
主分类号 |
E21B17/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|
您可能感兴趣的专利
METHOD AND DEVICE FOR PROTECTING DATA OF FLASH MEMORY
PH INDICATOR DEVICE AND FORMULATION
PREFERRED VOLUMETRIC ENLARGEMENT OF III-NITRIDE CRYSTALS
SUBSTITUTED (S)-(2R,3R,5R)-3-HYDROXY-(5-PYRIMIDIN-L-YL)TETRAHYDROFURAN-2- YLMETHYL ARYL PHOSPHORAMIDATE
OXYGEN DETECTING AGENT COMPOSITION, AND MOLDED ARTICLE, SHEET, OXYGEN SCAVENGER PACKAGING MATERIAL, AND OXYGEN SCAVENGER USING SAID COMPOSITION
USER INTERFACE PROGRAMMATIC SCALING
Pusher mechanism and pusher mechanism guide, merchandise display system comprising such a pusher mechanism and pusher mechanism guide and a method for displaying merchandise using such a merchandise display system
DISCRETIONARY POLICY MANAGEMENT IN CLOUD-BASED ENVIRONMENT
A TREATMENT APPARATUS, USING A STERILIZING SUBSTANCE, FOR CLOSURES FOR CONTAINERS
MILL FOR GRINDING RUBBISH
Connecting piece and assembly set
COMPOSITION FOR USE IN BRAIN GROWTH AND/OR COGNITIVE AND/OR PSYCHOMOTOR DEVELOPMENT
CLEANING COMPOSITIONS
LASER EYE SURGERY SYSTEM CALIBRATION
PLANT GROWTH KINETICS CAPTURED BY MOTION TRACKING
ULTRASONIC VOLUME FLOW MEASUREMENT FOR ABLATION PLANNING
Machine for machining walls, particularly for walls made of wood or multilayer walls and the like
Laminated chip electronic component, board for mounting the same, and packing unit thereof
PASTA MAKING ATTACHMENT TO A MULTI-PURPOSE KITCHEN MACHINE
THREAD FORMING JAMSHIDI ASSEMBLY