Inventors:
Robert E. Hardy, Duane J. Walhof, Terry A. Adams, David A. Kocak, Donald J. Siglin, Richard R. Klock, William H. Hockenberry, Jr., William W. Cooper, Rick G. Klinkhammer, Keith M. Polzin, Richard W. Wickstrom, Delmar E. Ostrem, Monte L. Peters