Number | Name | Date | Kind |
---|---|---|---|
4967535 | Alderman | Nov 1990 | A |
5491952 | Alderman et al. | Feb 1996 | A |
5561959 | Alderman et al. | Oct 1996 | A |
5653081 | Wenrick et al. | Aug 1997 | A |
5720147 | Wenrick et al. | Feb 1998 | A |
5921057 | Alderman et al. | Jul 1999 | A |
Number | Date | Country |
---|---|---|
0778377 | Jun 1977 | EP |
0018006 | Apr 1980 | EP |
9909271 | Feb 1999 | WO |
Entry |
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EP Search Report 00126471, Sep. 21, 2001. |