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Liao; Ying Chou
Taichung, TW
No. of patents:

Patent Number Title Of Patent Date Issued
6996910 Laser leveling device for generating parallel lines February 14, 2006
A laser leveling device includes a laser instrument having a base rotatably received in a cavity of a housing and having a light emitting device to generate a light beam, such as a line-shaped light beam. One or more batteries may be used to energize the light emitting device. The li

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