A trademark is registered over a name for particular goods and services, never over a name in general. Those goods and services are sorted by the Nice Classification en.wikipedia.org: 45 classes, 1 to 34 for goods and 35 to 45 for services, administered by WIPO en.wikipedia.org under an agreement dating from 1957 and revised on a five-year cycle. So the same word can belong to two companies selling unrelated things. Neither is doing anything wrong.

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