Whether you can get the certificate after the invention patent is publicized depends on the actual trial situation, that is to say, the examiner will conduct a comprehensive search to see if there is any content similar to or related to the invention application published before the filing date. The examiner will evaluate the patentability (novelty, creativity and practicality) of the invention application, authorize the release that meets the authorization conditions, and reject the non-conformity. Generally, there will be a result after repeated communication and revision between the applicant and the examiner, usually after publicity.
Now it can be implemented and temporarily protected, but any infringement can not be traced back until the patent is authorized;
Any letter of cooperation is a lie. Don't believe it.