Indeed, but when he posted the link, it was to what is
at [[Baltzar von Platen (1898-1984)]]. Such is the Wikipedia, after
all. Perhaps one could look at the page's history, but...
I don't know about that von Platen's historical significance, and the
article certainly doesn't give me a good idea of it. The way it stands
right now, I would prefer the relevant information to be moved to an
article about the [[gas absorption refrigerator]], especially since much
of it does not refer to the person but to the historical context:
"In 1923 production by AB Arctic began. In 1925 AB Arctic was purchased
by Electrolux which began selling them worldwide. Servel purchased rights
to manufacture the refrigerator in 1925 and was the only U.S. manufacturer
for many years."
If all von Platen is famous for is his participation in the development of
refrigerators, then no, I do not think he necessarily needs his own
article. That's what redirects are for.