What US Army insignias are these?

I picked up some patches for a good deal at the local army navy store and found out all but four. All are OD and Black not colored. Any info appreciated:

Patch 1: Circular patch with quatrefoil in middle with what looks like four propellers coming out of quatrefoil. Almost looks like the 88th infantry SSI.

Patch 2: Circular patch with crossed towers like the towers of Engineer Branch

Patch 3: Shield shape. Straight on top, with "U" shape bottom. Star in middle of triangle over an circle. Both triangle and circle black but OD field in center where star is.

Patch 4: Shield with pointed top and "V" shaped bottom. Arrow points up, almost goes up to top of patch. Two Fleur-de-Lys french symbols on each side of arrow.

P.S. I already went on wikipeida and looked up all division and corps insignias for the US Army.