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公开(公告)号:US1903995A
公开(公告)日:1933-04-18
申请号:US30471928
申请日:1928-09-08
Applicant: RAY GRAHAM CLARENCE
Inventor: RAY GRAHAM CLARENCE
IPC: A63G1/34
公开(公告)号:US1903995A
公开(公告)日:1933-04-18
申请号:US30471928
申请日:1928-09-08
Applicant: RAY GRAHAM CLARENCE
Inventor: RAY GRAHAM CLARENCE
IPC: A63G1/34