U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

A system of eyewear that eliminates the need for hinges on the frames of the eyewear.

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Assignee: Dowa Hightech Co., LTD

Location: Tokyo, JP
No. of patents: 1

Number	Title	Issue Date
6221322	Strontium nitrate and method for manufacturing same Low-cost, high-purity strontium nitrate that is low in Ba, Na, Ca, Cr, and other impurities and that is suitable for use in airbags or the like is provided. High-purity strontium nitrate having a Ba content of 0.01 wt % or lower, an Na content of 0.005 wt...	04/24/2001