IP Library › Granted Patent US 540,990
Granted Patent S1
US 540,990 · App. 29/237,555 · Granted Apr 17, 2007

Welding mask

Assignee: Otos Tech Co., Ltd.
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Quick Facts
Patent No.
US 540,990
App. No.
29/237,555
Granted
Apr 17, 2007
Kind
S1
Claims (1)

The ornamental design for a welding mask, as shown.

Assignments (2)
CHANGE OF ASSIGNEE'S ADDRESS Recorded Oct 24, 2008
From: OTOS TECH CO., LTD.
To: OTOS TECH CO., LTD.
Reel/Frame 021731/0228 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 17, 2005
From: HUH, MOON YOUNG
To: OTOS TECH CO., LTD.
Reel/Frame 017082/0373 →