Errata In the list of patents which expired on July 5, 1998, due to failure to pay maintenance fees, in the OG of September 15, 1998, Patent Number 5,327,427 should not have appeared since the fee was timely paid. In the list of patents which expired on January 26, 1998, due to failure to pay maintenance fees, in the OG of October 6, 1998, Patent Number 5,332,023 should not have appeared since the fee was timely paid. In the list of patents which expired on April 26, 1998, due to failure to pay maintenance fees, in the OG of September 15, 1998, Patent Number 5,305,626 should not have appeared since the fee was timely paid.