C. A. 8th Cir. [Certiorari granted, 436 U. S. 943.] Motions of Licensing Executives Society (U. S. A.), Inc., Patent, Trademark and Copyright Section of the State Bar of Texas, and American Patent Law Assn, for leave to file briefs as amici curiae, granted. Motion of the Solicitor General for leave to participate in oral argument as amicus curiae granted and 15 additional minutes allotted for that purpose. Respondent also allotted 15 additional minutes for oral argument.