Use an experimental device in a paper and not mentioning the one who made it
You didn't answer the questions I posed in the comments, so I'll have to make my best guesses as to what happened. Seems to me that you are asking about two types of damages: not getting authorship on the follow-up paper, and not getting paid for the device. 

Authorship. This one really depends on exactly what the new paper says. I'm assuming that (1) at least one person [your advisor] is an author on both the old paper and the new paper, and (2) the new paper briefly described the apparatus but focused on the new results. In this case, I certainly think they should have cited the original paper when describing the apparatus, and possibly offered you authorship on the new paper -- but it's not clear to me that their failure to do so rises to the level of academic misconduct. Your university's ombudsman is likely the next step if you want to investigate this further; however, this will likely alienate the professor in question (and, as I said, it's not clear to me that you have a case). 

Getting Paid. It's not clear to me why you would have any expectation of getting paid for building an apparatus as a student. In general, your intellectual property while a student belongs to the university (even more so if they are paying you). I don't know why your professor would have promised to look into getting the department to buy the apparatus...perhaps he looked into it and was informed that the university already owns it because you were a student when you made it. In any case, if you were owed money, your next step would likely be to sue the university, since your direct requests have largely gone unanswered (you would have to weigh whether this were a good idea; cutting your losses may be wise).