I thought all clinical trials have to be registered on https://clinicaltrials.gov https://clinicaltrials.gov to be considered by FDA in the application. But I

I thought all clinical trials have to be registered on https://clinicaltrials.gov https://clinicaltrials.gov to be considered by FDA in the application. But I can only find some from their competitor [1] - https://clinicaltrials.gov/study/NCT01964261?term=device&cond=Quadriplegia&rank=1 https://clinicaltrials.gov/study/NCT01964261?term=device&con... - https://clinicaltrials.gov/study/NCT01849822?term=device&cond=Quadriplegia&rank=4 https://clinicaltrials.gov/study/NCT01849822?term=device&con... [1] https://newatlas.com/computers/neuralink-bci-fda-human-blackrock/ https://newatlas.com/computers/neuralink-bci-fda-human-black... (May 2023) > But another company, Blackrock Neurotech in Salt Lake City, Utah, has already got its similar Neuroport Array chip implanted in human patients. This device pokes out through the skin, making it a lot less discreet, but it places some 96 "array" needles in the brain and opens up 600-odd channels of communication. Indeed, according to Blackrock, the Neuroport was first stuck into a human brain all the way back in 2004, and has been implanted more than 50 times now.