Key point 1: Write the core necessary technical features into the independent claim to achieve maximum protection.
Point 2: Write unnecessary technical features into the series of claims, because the subordinate rights are optional and can achieve maximum protection.
Point 3: avoid a patent with only one independent claim and no subordinate claim, and the scope of protection is too small.
Point 4: Avoid the independent claims being too specific or too abstract.
Fifth, avoid logical inconsistency.
Point 6: Avoid the division error between the technical scheme recorded in the claim and the prior art..
Point seven: avoid the background technology being too simple and vague.
Point 8: Avoid technical misunderstanding, which makes written expression incomprehensible or even impossible.
Ninth: avoid insufficient publicity.