The secondary research process involved comprehensive analysis of regulatory databases, patent repositories, technology standards publications, and authoritative telecommunications & consumer electronics organizations. Key sources included the Federal Communications Commission (FCC), National Telecommunications and Information Administration (NTIA), National Institute of Standards and Technology (NIST), US Patent and Trademark Office (USPTO), European Patent Office (EPO), Japan Patent Office (JPO), China National Intellectual Property Administration (CNIPA), Institute of Electrical and Electronics Engineers (IEEE), International Organization for Standardization (ISO), International Electrotechnical Commission (IEC), Consumer Technology Association (CTA), VR/AR Association, XR Association, International Data Corporation (IDC), Gartner Research, NITI Aayog (India), Ministry of Industry and Information Technology (China MIIT), and EU Digital Economy Reports.
These sources were employed to gather shipment statistics, spectrum allocation data, patent filing trends, standardization protocols, and regulatory compliance requirements for binocular smart glasses, monocular devices, integrated AR glasses, external smart glasses, and mobile phone-tethered solutions.