How do you know that the patent application failed?

1. The picture you uploaded shows that the utility model 20111-30 has been authorized (if the utility model is not authorized, it can't be found online. The announcement indicates authorization. )。 -You can also make general confirmation on the right side of the middle part of China National Intellectual Property Administration homepage through the patent legal status inquiry.

2. The certificate should have been sent. Please find the recipient ZY and check the receiving records since last year's 65438+February. When it is confiscated, you can go to China National Intellectual Property Administration's homepage and ask their hotline.

As for "many patent transfer companies send me letters": most of these letters are unreliable. Please polish your eyes.