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发明名称
Operator for counterbalanced elevator doors
摘要
申请公布号
US1989148(A)
申请公布日期
1935.01.29
申请号
US19330691397
申请日期
1933.09.28
申请人
THE PEELLE COMPANY
发明人
PEELLE ROBERT S.
分类号
E05F15/16;G05D3/00
主分类号
E05F15/16
代理机构
代理人
主权项
地址
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