US Trademark Classification US09 Scientific and electronic apparatus 燃料电池堆（009-6283） Class 09 燃料电池堆 009-6283 Chinese 燃料电池堆 English Fuel cell stacks Term ID 009-6283 Class 09 Type Goods Status Active · added, not since modified (A) Effective date 2022-05-19 Version 11-2022