It is to protect patents that are illegally registered by others
For example, defensive patent portfolios
1. Price of one yuan: Google sold 9 patents to HTC for one yuan .
2. Google can sublicense: Google also requires that it is authorized by HTC (license)
3. Buy-back terms (buy-back): Google has the right to buy back in the future These 9 patents (also use one yuan?).
4. "Against Apple" clause: The only purpose of the agreement is to allow HTC to use these 9 patents to sue Apple
5. Exchange of Apple information