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公开(公告)号:US3356287A
公开(公告)日:1967-12-05
申请号:US47534465
申请日:1965-07-28
Applicant: GRANVILLE PHILLIPS COMPANY
Inventor: WINTERS HAROLD F
IPC: H01J41/16
CPC classification number: H01J41/16
公开(公告)号:US3356287A
公开(公告)日:1967-12-05
申请号:US47534465
申请日:1965-07-28
Applicant: GRANVILLE PHILLIPS COMPANY
Inventor: WINTERS HAROLD F
IPC: H01J41/16
CPC classification number: H01J41/16