(2) Write unnecessary technical features into the series of claims, because the subordinate rights are optional, which can achieve maximum protection.
(3) avoid a patent with only one independent claim and no subordinate claims, and the scope of protection is too small.
④ Avoid the independent claims being too specific or too abstract.
⑤ Avoid logical inconsistency.
6. Avoid the division error between the technical scheme described in the claim and the prior art..
⑦ Avoid the background technology being too simple and vague.
⑧ Avoid technical understanding mistakes, which make written expression incomprehensible or even impossible.
Pet-name ruby avoid insufficient publicity.