The only number I see on the summer sheild is L289A-200B. The sheild energizer 3/4" tabs has a few numbers EPA Reg No 748-286, EPA Est. No. 58401-IL-1, PPG Product# 98994, LP20TSUS-0911E, ESL051811 REV093011 & the 3" cholorinating tabs EPA Reg No 748-275, EPS Est no 58401-IL-1 PPG Product No 38784, LP16TSUS-0911C, ESL051911 REV 093011.
I also sent them an email asking for the patent numbers. Thank you again for your help!