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特許 権利維持 For your reference, I have included a brief summary of the technical details of my patented technology: Air Filter on every vehicle Every Vehicle can clean Air more than it polluted--- In today’s world one of the major problems for the humanity is air pollution. Many thousands deaths in the world are due to air pollution. In future, air pollution problem rise further due to industrialization. Providing clean air is a big challenge to every government. Many air filters are available in the market, but they have limited use i.e. in a room or in a vehicle. All these filters are operated by electricity. We discover an idea to clean air without any energy source. It is a passive air filter. In all filters air passes through filter membranes with pressure, which requires energy source. We put filter membrane on a vehicle i.e. public transports and private vehicles. This arrangement needs only regular cleaning of filter membranes. This way air pollution can be reduced at a great level.