Should I update my applications

Hi.
First a little background of myself: I am an international student applying to the U.S. to several schools including MIT and Harvard.
And I have being working on an internship at a commercial aircraft repair center.
Recently I have helped to develop an equipment that will be used by the technicians of the company, but it will be ready until February

Now my problem is that I did not mention this anywhere on my applications. Should I update my applications by sending each college an email about this or not?

Thank you