I applied for a patent last year, and it is still under examination, but there are similar products on the market now. Is my patent still useful?

This depends on whether the products on the market have applied for patents. If not, then you have priority over his applicant. If your patent has the necessary conditions for a new application, it can be passed. And if necessary, you can send a lawyer's letter or coordinate with that company to see if you are willing to give them your patent right. You can also call a professional patent agency. I'll introduce you to a patent agency, which is also one of the best in Chengdu. More importantly, they also have their own law firm. Ha ha.