Good afternoon. I am not sure that I understand your request.
Often when assembling the nine patch block, I sew three strips together lengthwise and then cut the required width from the length of the new strip. I find this is the fastest way in which to assemble the original nine patch block. There are several ways to cut the resulting block to create the disappearing nine patch sections.
Your blocks could be either even (same size patches) or uneven (different size patches) nine patches, depending upon the desired result.
There is another technique for creating both a negative and a positive nine patch block. You start with two squares of equal dimensions, right sides together, and sew down the left and right sides only with a 1/4 inch seam. Then you cut the squares in strips. Putting one strip on each pieced strip to create alternating colors (red,white,red and white,red, white).
Good luck! Please don't hesitate to respond if I am way off base :-)