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公开(公告)号:US2938211A
公开(公告)日:1960-05-24
申请号:US53551655
申请日:1955-09-20
Applicant: ENGELHARD IND INC
Inventor: NORDSTRAND ROBERT A VAN , TETER JOHN W , KEITH CARL D , HAUEL ANNA P
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2.
公开(公告)号:US3058907A
公开(公告)日:1962-10-16
申请号:US1611460
申请日:1960-03-03
Applicant: ENGELHARD IND INC
Inventor: NORDSTRAND ROBERT A VAN , TETER JOHN W , KEITH CARL D , HAUEL ANNA P
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