Inventing expenses are not deductible, since 2017. Even in the "old days" , they were only a misc. itemized deduction. You only got to deduct that portion of your misc. itemized deductions that exceeded 2% of your AGI, and then only if your total itemized deductions exceeded the standard deduction (which was doubled under the 2018 tax law. . (2% rule explained: https://ttlc.intuit.com/questions/2902781-what-is-the-2-rule ).
If it was a for credit course, at an eligible institution, it might be eligible for a 20% tuition credit. If the school did not issue a form 1098-T, it's probably not eligible.