I'm guessing a 4 patch is 4 squares (2x2)..2 on top, 2 on bottom...
A nine patch is (3x3)...3 squares on top, 3 in the middle, 3 on the bottom...like a tic-tac-toe board.
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9 Patch
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l_l_l 4 Patch???
I'm good at confusing more than helping...HOPEFULLY that helps! LOL!