-
公开(公告)号：CA469243A
公开(公告)日：1950-11-07
申请号：CA469243D
Applicant: STANDARD OIL DEV CO
Inventor： NELSON JOSEPH F , WELCH LESTER MARSHALL
-
公开(公告)号：CA473671A
公开(公告)日：1951-05-15
申请号：CA473671D
Applicant: STANDARD OIL DEV CO
Inventor： WELCH LESTER MARSHALL , LIPPINCOTT SAMUEL B
-
Search Results
2
records
(took 0.025 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
