Help identify: J.B. Owens Pottery Co or Ohio Pottery Company?

by Wendy
(Ann Arbor, MI )

The backside of this small container has the following inscription:

PATPENDING
O.P.C.O.
ZANESVILLE O
U.S.A.

Can you identify whether this refers to J.B. Owens Pottery Co. or Ohio Pottery Company?

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