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公开(公告)号：US2747538A
公开(公告)日：1956-05-29
申请号：US32275852
申请日：1952-11-26
Applicant: H B IVES COMPANY
Inventor： MORSE JR JOHN B , BENSON FRITZ C
IPC: G10K3/00
CPC classification number: G10K3/00 , Y10S116/12
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公开(公告)号：US2920854A
公开(公告)日：1960-01-12
申请号：US52053455
申请日：1955-07-07
Applicant: H B IVES COMPANY
Inventor： MORSE JR JOHN B
IPC: A47G25/06
CPC classification number: A47G25/0607
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