After searching for the topper trademark, it was found that there are approximately 18, among which the more famous one is the 28 categories of trademarks applied by Pizza Hut International Co., Ltd. Pizza Hut International Co., Ltd. applied for the trademark "TOPPER" on 2000-03-23.
Pizza Hut International Co., Ltd. belongs to No. 14841 Dallas Road, Dallas, Texas, USA
So it should be American. And of course there are trademarks in the categories for which they are applied.