Minnie Mueller Tolke, of Covington, KY, who was doing business at Pearl & Main in Cincinatti, registered this brand name as a trademark (as shown) in 1899. She said that she had used the symbols since 1898, and that she sometimes had them blown into the glass.
There must have been some kind of relationship between Tolke and Harry W. Crolley (see "Barber In A Bottle"). I thought it was very coincidental that two people from the same town registered consecutive trademarks for the same type of products.