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公开(公告)号：US2764994A
公开(公告)日：1956-10-02
申请号：US19963650
申请日：1950-12-07
Applicant: NELSON SPECIALTY CORP
Inventor： TED NELSON
IPC: B60S5/04
CPC classification number: B60S5/043 , Y10T137/3615 , Y10T137/3662
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公开(公告)号：US2638113A
公开(公告)日：1953-05-12
申请号：US10709049
申请日：1949-07-27
Applicant: NELSON SPECIALTY CORP
Inventor： LEROY STURMER ROBERT
IPC: B60S5/04
CPC classification number: B60S5/043 , Y10T137/3631 , Y10T137/782 , Y10T137/7831 , Y10T137/7836
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