Publication Info Source Type Article/Report Permission Date 2003-09-29 Website Link Quick shut-off extended range hygroscopic rain sensor for irrigation systems Publication Title Quick shut-off extended range hygroscopic rain sensor for irrigation systems Publication Author(s) Klinefelter PA, BA Coppola, CS Gardner, and PH Warren Jr Publishing Organization U.S. Patent Office Page Number(s) U.S. Patent 6,570,109 Year Published 2020 Publish Date / Date Accessed 2003-05-27