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公开(公告)号:US2263962A
公开(公告)日:1941-11-25
申请号:US32128740
申请日:1940-02-28
Applicant: GEN MOTORS CORP
Inventor: WISE ARTHUR G
IPC: D01H1/244
CPC classification number: D01H1/244
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公开(公告)号:US2138531A
公开(公告)日:1938-11-29
申请号:US11885837
申请日:1937-01-02
Applicant: GEN MOTORS CORP
Inventor: WISE ARTHUR G , MAPES CLYDE W , CHRYST WILLIAM A , FUCHS HENRY O
IPC: B04B9/12
CPC classification number: B04B9/12 , Y10T74/2109
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