8/22/2019 U.S. Patent 4465455_14_08_1984 1/5 8/22/2019 U.S. Patent 4465455_14_08_1984 2/5 8/22/2019 U.S. Patent 4465455_14_08_1984 3/5 8/22/2019 U.S. Patent 4465455_14_08_1984 4/5 8/22/2019 U.S. Patent 4465455_14_08_1984 5/5