The article does not claim such thing. John writes
" After many further developments, in 1948 the physicist William Schockley patented transistors that use both holes and electrons to form a kind of switch. "
Which it is correct as you can easily check here: https://patents.google.com/patent/US2569347
This not the case of a PHB robbing all the limelight from the engineers. Shockley was kinda of an asshole and had a big ego but he was a great scientist. And the junction transistor he individually designed and patented (see above) went on to be more successful than the point-contact transistor developed by Brattain and Bardeen. The Nobel prize was fairly awarded to the three of them.