Patent search ap:("KEYSTONE CONSOLIDATED IND INC") AND inv:"HALLGREN CHARLES G" Page 1

1.

发明授权
Garage door locks 失效
Title translation: 加油门锁

公开(公告)号：US3452564A

公开(公告)日：1969-07-01

申请号：US3452564D

申请日：1967-02-06

Applicant: KEYSTONE CONSOLIDATED IND INC

Inventor： HALLGREN CHARLES G

IPC: E05B15/02 , E05B9/08

CPC classification number: E05B15/02 , Y10T70/7655 , Y10T70/8541 , Y10T70/8568 , Y10T292/88

Patent Agency Ranking