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公开(公告)号:US2479324A
公开(公告)日:1949-08-16
申请号:US4082148
申请日:1948-07-27
Applicant: DAWSON JOHN H
Inventor: DAWSON JOHN H
IPC: A47J37/06
CPC classification number: A47J37/0694
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公开(公告)号:US2340649A
公开(公告)日:1944-02-01
申请号:US47487143
申请日:1943-02-05
Applicant: DAWSON JOHN H
Inventor: DAWSON JOHN H
IPC: F41J7/04
CPC classification number: F41J7/04
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公开(公告)号:US2261512A
公开(公告)日:1941-11-04
申请号:US34059240
申请日:1940-06-14
Applicant: DAWSON JOHN H
Inventor: DAWSON JOHN H
CPC classification number: A63H17/006 , A63H27/14 , A63H33/003
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公开(公告)号:US2148442A
公开(公告)日:1939-02-28
申请号:US20118938
申请日:1938-04-09
Applicant: DAWSON JOHN H
Inventor: DAWSON JOHN H
IPC: A63H1/00 , A63H27/127
CPC classification number: A63H1/00
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