The Baldpate Co., of New York City, registered the word "Baldpate" as a trademark for a "Hair Tonic" in 1914 (TM #99,935). They said they had just started selling the name that year. They mentioned that the members of the firm were Louis M. Honic and Louis Westphal.
It's possible that this Westphal was related to Paul Westphal. According to Devner, the Tonic was advertised in 1915 as a tonic "for nourishing and strengthening hair follicles and promoting hair growth." I found the product advertised as late as 1933