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公开(公告)号：US1674327A
公开(公告)日：1928-06-19
申请号：US16476727
申请日：1927-01-31
Applicant: MAGNAVOX CO
Inventor： FORD GREAVES VALENTINE
IPC: B23K11/24
CPC classification number: B23K11/24
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公开(公告)号：US1657221A
公开(公告)日：1928-01-24
申请号：US1758025
申请日：1925-03-23
Applicant: MAGNAVOX CO
Inventor： METCALF HERBERT E , FORD GREAVES VALENTINE
IPC: H01J1/18
CPC classification number: H01J1/18
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公开(公告)号：US1657208A
公开(公告)日：1928-01-24
申请号：US1750825
申请日：1925-03-23
Applicant: MAGNAVOX CO
Inventor： FORD GREAVES VALENTINE
CPC classification number: H01J9/36 , Y10T29/49153 , Y10T29/49929
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