Assignee

H & H INVENT & ENTERPRISES INC

US·2 granted patents·6 citations·filing 2018–2019

Technology mixB01D2 B01F2 C02F2

Top patents by PatentIndex Score

2 records

0179US10245546B1Exhaust gas purification method and systemH & H INVENT & ENTERPRISES INC·Filed 2018·Granted Apr 2, 2019·6 cites·20 claims
0251US10905993B2Exhaust gas purification method and systemH & H INVENT & ENTERPRISES INC·Filed 2019·Granted Feb 2, 2021·0 cites·20 claims

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