发明者
Eckhard Alt
发表日期
2002/5/14
专利局
US
专利号
6387121
专利申请号
09634667
简介
Continuation-in-part of application No. 09/175,919, filed on Oct. 20, 1998, now Pat. No. 6,099,561, which is a continu ation-in-part of application No. 09/059,053, filed on Apr. 11, 1998, now abandoned, which is a continuation-in-part of application No. 08/733,553, filed on Oct. 21, 1996, now Pat. No. 5,824,045.
引用总数
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E Alt - US Patent 6,387,121, 2002