Patent search ap:("BECKWITH MFG CO") AND inv:"GRANT REUBEN P" Page 1

1.

发明授权
Removable top lift 失效
Title translation: 可拆卸顶部电梯

公开(公告)号：US1998012A

公开(公告)日：1935-04-16

申请号：US65280133

申请日：1933-01-21

Applicant: BECKWITH MFG CO

Inventor： GRANT REUBEN P

IPC: A43B21/37 , A43B21/39 , A43B21/42

CPC classification number: A43B21/37 , A43B21/39 , A43B21/42

Patent Agency Ranking