It is indeed difficult to promote, which is also commonly encountered by individual applicants.
Of course, you must have market experience and promote through the local science and technology committee, intellectual property office, and through the Internet.
In addition, China Intellectual Property News also publishes promotional information in each issue (the fee is unknown).
You can also directly search for the supported mobile phone cases you want to promote on Alibaba. There are many companies there. Basically, there are mobile phone manufacturers all over China. Come to Shenzhen. After all, it is relatively mature and has a good reputation. Manufacturer managers promote your patent, and if they think it is necessary, they will pay to cooperate with you or buy your patent.
Again, it is really difficult to make money from patents, but once the deal is settled, it will be fun every night for the rest of your life. I design mobile phone software, and I know very well that our company actually welcomes your patents