Complex sentence: The initial name of the partnership was the Supply Stores from 1930 to 1935 when it was made singular 1935 as the Supply Store (with each town's name preceding it) which remained its name until 1952.
Split into simpler sentences: The initial name of the partnership was the Supply Stores from 1930 to 1935. The name was made singular in 1935 as Supply Store, with each town's name preceding it, which remained its name until 1952.