How to highlight original work in a talk where it is not expected?
First, make sure that you are referencing the works of others that you build upon. This way, the audience should be able to easily distinguish the results that belong to you vs. the results that belong to others.

For a published work of yours, I'd prefer a Carter, 2017 citation, including the name of the journal or a conference, and some of the following: name of the article, DOI, link or issue and page number.

For an unpublished work of yours, I'd use an own work or own data notice. This way, you do not make a false impression that this work is already published. Your audience will possibly infer that these data are fresh from the lab bench. If I were to attend your talk, I'd pay more attention to these data, because these are ones I wouldn't be able to found in the literature (yet).

For an unpublished joint work, still use an own work notice, but add in collaboration with X, University of Y to give credit both to you and the other person.