PATENTS

1. “Paper roughness or gloss sensor using polarized light reflection”, U.S. Patent no. 5,162,660, filed June 27, 1991.
   
   
2. “On-line texture sensing”, U.S. Patent no. 4,931,657, filed April 13, 1989.
   
   
3. “Residual Ink Measurement”, U.S. Patent no. 5,278,411, filed October 1, 1992.