Yep; that's what the Constitution says. Period.
Corporations aren't natural people with God-given rights; they are legal entities created by law: as such they are wholly and utterly bound by the law and have nothing which extends beyond law — a natural person does.
Besides, the whole point of a corporation is to provide insulation and protection of investors from the actual operations… as well as to provide continued operations apart from the original investors. (In other words, like Disney, a company can extend beyond the lifetime of those who created it.) — As far is the law is concerned it is a completely and entirely separate legal entity from not only the investors but the employees too.
You can't say that corporations are people
and then extend to them rights specifically reserved for a particular class of persons (authors and inventors) which they manifestly cannot be: a corporation cannot write nor invent anything, thus it cannot be an author or inventor.
(All it can do is employ actual authors and inventors; this used to be called commissioning
and the commissioner, while afforded privledges to the work, is most assuredly NOT the author or inventor.)
Looks like you built a strawman of an argument. I’ve never seen a patent issued to a corporation maybe you can cite one. I’ve seen plenty of patent rights assigned to corporations by patent holders some of whom worked for that same corporation and in fact the employees where paid to do just that.
Certainly nothing unconstitutional in that.