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4674843 | Baba et al. | Jun 1987 | A |
5870229 | Tsuchida | Feb 1999 | A |
6088166 | Lee | Jul 2000 | A |
20030117715 | Schnitzer | Jun 2003 | A1 |
Entry |
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NSG America, Inc.; “Grin and SELFOC” 1 page; http:/www.nsgamerica.com/grin_selfoc.shtml. |