(1) Utility models only protect the product structure (shape, structure), including layer structure, while inventions can not only protect the structure, but also the method (process, process, use, etc.);
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(2) The examination of utility model patent applications adopts formal examination, while the examination of invention patent applications requires substantive examination (patent three-character examination). The examination period for utility models is shorter, while the examination period for inventions is Longer, the utility model will be announced and authorized after formal examination, and the invention needs to be disclosed first and then announced and authorized;
(3) The protection period for utility models is 10 years, and the protection period for inventions is 20 years;
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(4) Compared with inventions, the stability of patent rights for utility models is not as stable.