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公开(公告)号：US2370729A
公开(公告)日：1945-03-06
申请号：US50242943
申请日：1943-09-15
Applicant: HOPPE CHARLES W
Inventor： HOPPE CHARLES W
IPC: B23B31/20
CPC classification number: B23B31/201 , Y10T279/17521
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公开(公告)号：US2319233A
公开(公告)日：1943-05-18
申请号：US38249141
申请日：1941-03-10
Applicant: HOPPE CHARLES W
Inventor： HOPPE CHARLES W
IPC: A47K5/10
CPC classification number: A47K5/10
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