How to verify the collection of patent fees from foreign companies

1. Consult the contract documents: read the contract documents signed with foreign companies carefully to understand the relevant terms and agreements, including the payment method and specific amount of patent fees.

2. Contact a patent agency or lawyer: consult a patent agency or lawyer, get professional legal advice and guidance, and verify the rationality and legality of patent fees.

3. Compare the market price: understand the market price and value of similar patents, and compare them with the patent fees in the contract to ensure that they are not overcharged or overcharged.