What is the difference between Haier water heater patent anti-electricity wall 2.0 and 3.0?

1. The patent for the technology of "anti-electricity wall" is not Haier's patent technology, but the invention patent of Shenzhen Mingjia Industrial Development Co., Ltd. In August, 2003, Shenzhen Mingjia Industrial Development Co., Ltd. filed a request for invalidation with the Patent Reexamination Board of the State Intellectual Property Office on the "Haier Anti-electricity Wall Patent". After examination, Shenzhen Mingjia Company has applied for the patent right of "thermal insulation wall" technology. Legally speaking, Haier's "electric water heater against electric shock" has the novelty required by the patent law, but it is not creative. Therefore, the Patent Reexamination Board of the State Intellectual Property Office made a decision on June 22, 2005: Haier's "electric water heater against electric shock" patents were all invalid.