Who holds what · as the FAA records the name

Sentinel Electronics, INC.

Named as the FAA publishes it on its approvals.

Approved to make 1 class of equipment. FAA spelling: Sentinel Electronics, Inc..

Equipment approvals technical standard order authorisations

TSO-C74B · Airborne Atc Transponder Equipment · *, *, * · instruments and avionics

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.