-
公开(公告)号：US2614334A
公开(公告)日：1952-10-21
申请号：US23569751
申请日：1951-07-09
Applicant: STANDARD OIL DEV CO
Inventor： HILDEBRANDT ALEXANDER B
IPC: E21B47/022
CPC classification number: E21B47/02232
-
公开(公告)号：US2483770A
公开(公告)日：1949-10-04
申请号：US63705445
申请日：1945-12-22
Applicant: STANDARD OIL DEV CO
Inventor： HILDEBRANDT ALEXANDER B
IPC: G01V11/00
CPC classification number: G01V11/005 , Y10S181/401 , Y10T74/11
-
Search Results
12
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
