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公开(公告)号:US2878409A
公开(公告)日:1959-03-17
申请号:US65590157
申请日:1957-04-29
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI
CPC classification number: H01J1/28 , H01J9/047 , Y10T428/1216 , Y10T428/1259
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公开(公告)号:US2721372A
公开(公告)日:1955-10-25
申请号:US23451351
申请日:1951-06-30
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI
IPC: H01J9/04
CPC classification number: H01J9/047 , Y10T29/49812
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公开(公告)号:US3201639A
公开(公告)日:1965-08-17
申请号:US25810863
申请日:1963-02-07
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI
IPC: H01J1/28
CPC classification number: H01J1/28
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公开(公告)号:US2986799A
公开(公告)日:1961-06-06
申请号:US63229457
申请日:1957-01-03
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI , JACK OISHER
IPC: H01J9/04
CPC classification number: H01J9/047
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公开(公告)号:US3224071A
公开(公告)日:1965-12-21
申请号:US1479360
申请日:1960-03-14
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI , VANN EGGLESTON ROBERT
CPC classification number: H01J9/04 , B22F7/002 , B23K1/19 , B23K35/005 , Y10T29/49812
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6.Method of making thermionic dispenser cathode and cathode made by said method 失效
Title translation: 通过所述方法制造热离子分配器阴极和阴极的方法公开(公告)号:US2917415A
公开(公告)日:1959-12-15
申请号:US59974856
申请日:1956-07-24
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI
IPC: H01J9/04
CPC classification number: H01J9/047 , Y10S75/951 , Y10T428/12042 , Y10T428/12153 , Y10T428/1266
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公开(公告)号:US2869017A
公开(公告)日:1959-01-13
申请号:US61807256
申请日:1956-10-24
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI
IPC: H01J1/28
CPC classification number: H01J1/28
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8.
公开(公告)号:US3308530A
公开(公告)日:1967-03-14
申请号:US35151264
申请日:1964-03-12
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI , IRONS GARY C
CPC classification number: C23F1/38 , B22F3/1134 , B22F3/1146 , B22F2003/247 , B22F2998/10 , C22C1/08 , C23F1/00 , Y10T29/4981 , Y10T29/49812 , Y10T29/49982 , B22F3/26 , B22F3/16 , B22F3/24
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公开(公告)号:US2972078A
公开(公告)日:1961-02-14
申请号:US78860359
申请日:1959-01-23
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI
IPC: H01J20060101 , H01J1/28 , H01J9/04
CPC classification number: H01J1/28 , H01J9/047 , Y10T428/249955
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公开(公告)号:US2813807A
公开(公告)日:1957-11-19
申请号:US44432354
申请日:1954-07-19
Applicant: PHILIPS CORP
Inventor: ROBERTO LEVI
IPC: H01J9/04
CPC classification number: H01J9/047
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