This is just a small part of the patents that have been filed for mind control.
Surge in US 'brain-reading' patents:
Published 7 May 2015
https://www.bbc.com/news/technology-32623063
23 U.S. Patented Mind Control Related Devices (1956 – 2003):
Mind Control Devices 23 US Patents (1956–2003) (usa-anti-communist.com)
United States Patent 3,951,134, Malech April 20, 1976 -- Apparatus And Method For Remotely Monitoring And Altering Brain Waves.pdf:
Methods and Automatic System to Identify Who is Victims of Abuse Voice to Skull & Remote Neural Monitoring Technology and Identify Who is Remote Attacker or Operator Using Device of Voice to Skull & Remote Neural Monitoring:
https://patents.google.com/patent/US20200275874A1/en
Mind Controller:
https://patents.google.com/patent/US20030171688A1/en
Nervous system manipulation by electromagnetic fields from monitors:
https://patents.google.com/patent/US6506148B2/en
Mind-control Toys and Methods of Interaction Therewith:
https://portal.unifiedpatents.com/patents/patent/US-20100105478-A1
Mind control system for human interfaces
https://patents.google.com/patent/KR20170090373A/en