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