Jim,
I can't make out the detail of the triangular patch. These are trade or specialty insignia. They are blue with a yellow/gold symbol...camera, weather vane, bomb (I think). I don't have a good source for them at hand but these are what I have run into while collecting. I'm not finding the bar you mention...left sleeve may show a ~1.5 inch "bar" for each 6 months service overseas. Hope that helps.