Patent search ap:"PHILIP TODD JOHN" Page 1

1.

发明授权
Black-out lamp 失效
Title translation: 遮光灯

公开(公告)号：US2321636A

公开(公告)日：1943-06-15

申请号：US42959242

申请日：1942-02-05

Applicant: PHILIP TODD JOHN

Inventor： PHILIP TODD JOHN

IPC: F21V11/00 , F21V13/12

CPC classification number: F21V11/00 , F21V13/12

Patent Agency Ranking