Absolutely. Tim Berners-Lee was an independent contractor to CERN in his original March 1989 proposal [1]. But CERN paid the bills. I believe the point that citation [0] (above) is making in this regard is that CERN has received significant funding from the US, and that HTML/HTTP was an enabling technology of the original darpanet. CERN has 23 (European), even more Non-Member States (including the USA) and states with Observer status (Japan and USA). The US funding for CERN historically has been from both The US Department of Energy and The National Science Foundation [2]. The US contributed $531 million just for the Large Hadron Collider (LHC) CERN project alone [3].
[1] http://info.cern.ch/Proposal.html
[2] https://united-states.cern/funding
[3] https://physicstoday.scitation.org/do/10.1063/pt.4.0488/full...