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公开(公告)号:US2280073A
公开(公告)日:1942-04-21
申请号:US27364139
申请日:1939-05-15
Applicant: HALL JOSEPH M
Inventor: HALL JOSEPH M
IPC: B01D1/18
CPC classification number: B01D1/18
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公开(公告)号:US2133987A
公开(公告)日:1938-10-25
申请号:US69677333
申请日:1933-11-06
Applicant: HALL JOSEPH M , TUCKER HERBERT E
Inventor: HALL JOSEPH M , TUCKER HERBERT E
IPC: F16H61/02
CPC classification number: F16H61/0293 , F16H2710/08
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公开(公告)号:US1696478A
公开(公告)日:1928-12-25
申请号:US3509925
申请日:1925-06-05
Applicant: HALL JOSEPH M
Inventor: HALL JOSEPH M
IPC: B61G9/10
CPC classification number: B61G9/10
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公开(公告)号:US2238364A
公开(公告)日:1941-04-15
申请号:US20198038
申请日:1938-04-14
Applicant: HALL JOSEPH M
Inventor: HALL JOSEPH M
IPC: B01D1/20
CPC classification number: B01D1/20
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公开(公告)号:US1733223A
公开(公告)日:1929-10-29
申请号:US17115227
申请日:1927-02-26
Applicant: HALL JOSEPH M
Inventor: HALL JOSEPH M
IPC: F16F7/06
CPC classification number: F16F7/06
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