It depends on what you mean by tangible. You're meaning here seems to be something like "having a direct impact on the physical sciences", a very limited question considering the breadth of the topics covered by philosophy but certainly the answer even in this limited context is more than zero tangible results. Much research in artificial intelligence and machine learning is directly inspired by philosophy and has been since the beginning, so that would be a great area to start in. There has also been much work in the philosophy of language, science, mathematics, ontology and other branches of metaphysics, politics, aesthetics if you're willing to broaden your criteria for tangibility.