Needham, Massachusetts
United States
3
2021-06-10
The entities that hold a legal rights for patent applications filed by inventor LIU Sam:
Sam LIU from Needham, US has applied for patents for these inventions. The list has both pending applications and granted patents:
Surface cleaning head with leading roller
#2 | 2020-03-12Battery and suction motor assembly for a surface treatment apparatus and a surface treatment apparatus having the same
#3 | 2018-10-18Surface cleaning head with leading roller
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