IP Library › Granted Patent US 836,847
Granted Patent S1
US 836,847 · App. 29/596,815 · Granted Dec 25, 2018

Auto darkening filter for a welding helmet

Inventor: Ziqian Wu (Nanjing, CN)
Assignee: Tecmen Electronics Co., Ltd.
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Quick Facts
Patent No.
US 836,847
App. No.
29/596,815
Granted
Dec 25, 2018
Kind
S1
Claims (1)

The ornamental design for an auto darkening filter for a welding helmet, as shown and described.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 17, 2023
From: TECMEN ELECTRONICS CO., LTD.
To: TECMEN ELECTRONICS CO., LTD
Reel/Frame 063353/0937 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 3, 2017
From: WU, ZIQIAN
To: TECMEN ELECTRONICS CO., LTD.
Reel/Frame 042134/0274 →
Priority Claims (1)
CN 2016 3 0505605 · Oct 17, 2016 · national