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US1736496A Lamp 失效

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Patent Title: Lamp
Application No.: US16494227

Application Date: 1927-01-31
Publication No.: US1736496A

Publication Date: 1929-11-19
Inventor: GEORGE GRAFF
Applicant: DURA CO
Assignee: Dura Co
Current Assignee: Dura Co
Priority: US16494227 1927-01-31
Main IPC: B60Q3/02
IPC: B60Q3/02 ; F21V17/00

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US11451443B2 Communications network performance Public/Granted day:2022-09-20

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