Choco pie
Although Orion firstly began to produce 'Choco Pie', Lotte Confectionary also named its product with the same name 'Choco Pie'. Orion filed a lawsuit claiming ‘Choco Pie’ is its property, but it failed. The court had them allow 'Choco Pie' as a common noun. So there are three types of 'Choco Pie' from different companies, Orion, Lotte, and Crown.