patent law vs legal philosophy

patent law and legal philosophy both are nouns.

Word	Noun	Adjective	Verb	Adverb
patent law	Yes	No	No	No
legal philosophy	Yes	No	No	No

As nouns, legal philosophy is a hypernym of patent law; that is, legal philosophy is a word with a broader meaning than patent law:

patent law: that branch of jurisprudence that studies the laws governing patents
legal philosophy: the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do

Other hypernyms of patent law include jurisprudence, law.

patent law (noun)	legal philosophy (noun)
that branch of jurisprudence that studies the laws governing patents	the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do