The applicant is the ultimate subject of the rights and obligations of this patent. Applicants can apply for a patent with money, pay an annual fee and enjoy commercial benefits. There can be many applicants. The first applicant can save you. This situation must be a school or a government agency. At most, it is your teacher ... certainly not the first applicant of other individuals ... you don't have to think about it ... there is a second applicant and so on. You shouldn't fight for this applicant. First of all, you don't pay money (money is not a few dollars). Second, you just participate in the research, which has nothing to do with the subsequent rights and obligations. For example, if someone else uses what you made, the applicant has the right to ask him to pay or compensate. Would you do such a thing? ... the school should not give you this right so casually ...
Inventors are R&D personnel or something. It's easy to leave your name ~ it doesn't matter to tell your brothers before applying.
It should be noted that the applicant (regardless of the first and second) finally owns the patent certificate. The inventor didn't, but the name of the inventor was on the patent certificate.
Your situation should be regarded as a service invention, with concepts on it. Whether it is a service invention depends mainly on whether you have the qualifications of the applicant. I also said that the first applicant should forget it, and the second applicant is probably hopeless.
Work hard towards the inventor ~ ~ ~