Old Amber Bottle

This is an old amber bottle, not sure what kind. It is ribbed, except where the label goes, I am assuming that is where the label goes. Seam not over the top. On the front shoulder there is a 6. The bottle measures 4.5" x 3" x 1.5". Bottom says PATENT D120,846, and on other side of bottom says 46. Turning bottle sideways, the bottom also says 6 oz, circled A in the middle U.S.A. underneath and a .2 under that. I have several of these bottles. Any information is appreciated. Thank you!