What kind of invoice should I issue to buy a patent?

To buy a patent, you need to open a special VAT invoice. According to relevant public information, enterprises should obtain a special VAT invoice for intellectual property transfer when purchasing patent rights, and the patent rights belong to the seller's technology transfer taxable services, and the VAT is paid at 6%. Enterprises that purchase patents can obtain special VAT invoices provided by them, and the money is paid in cash. The purchaser shall confirm and measure the intangible assets with payment vouchers, and the unpaid amount may be confirmed and measured with transfer vouchers.