"Show me" is the motto of the State of Missouri. Could your father have been in a unit derived from the Missouri National Guard? I was in an Army museum that displayed about every Army patch that was ever created. It may have been at the Quartemaster Corps headquarters at Fort Lee Virginia but, it was so long ago I am no longer certain. The patch is defintely traceable but, it may no have made it to the internet yet. The Company B designation is not of much use. A company is only about 200-250 men and there is not an official published record of what any particular company did over the course of it's tour. If you knew which regiment you would have something.