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公开(公告)号：US2799788A
公开(公告)日：1957-07-16
申请号：US46932454
申请日：1954-11-16
Applicant: FITZGERALD JAMES W , MARKS SPENCE T
Inventor： FITZGERALD JAMES W , MARKS SPENCE T
IPC: G01L23/00
CPC classification number: G01L23/00 , Y10S73/04 , Y10S367/906
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公开(公告)号：US2894317A
公开(公告)日：1959-07-14
申请号：US43509954
申请日：1954-06-07
Applicant: MARKS SPENCE T
Inventor： MARKS SPENCE T
CPC classification number: H01G7/025 , B06B1/0611 , G01L9/008 , G01L23/10 , Y10T29/42
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