DMC flare

Who is DMC in reference to the following
Red tin that holds 3 flares
Tin is marked on front
3 Cartridges
Signal, Distress, 1"
Single Star, Reg, M73
Bomb Pic
Lot DMC 11 ate MAY 1945
Insp. C.W. MFG. DMC
The 3 fired flares have the same on case.
Who is DMC?
Bob Ruebel