The hands at the top of Philip's gravestone is a traditional symbol for someone descended from the priestly order (kohanim).
I read Philip's father's name quite differently as: reb Pinchas the son of reb Shmuel haCohen, (Usually R. stands for Rabbi). Shmuel is also more consistent with Philip's father's name which was Sam, as indicated on his death certificate.
There appear to be two nice photos of Anna and Philip at the top of their gravestones. Perhaps someone in Cincinnati could photograph them close up. (Love Brothers Cemetery is one of the older Cincinnati cemeteries.)
Newton, MA, USA