The U.S. aircraft register, updated daily
Who holds what · as the FAA records the name

Firstmark Aerospace Corporation

Named as the FAA publishes it on its approvals.

Approved to make 4 classes of equipment. FAA spelling: Firstmark Aerospace Corporation.

Equipment approvals technical standard order authorisations

2006-01-26TSO-C124A · FLIGHT DATA RECORDER SYSTEMS · Position Sensors, Position Sensors, Position Sensors · other and general
2006-01-26TSO-C6D · DIRECTION INSTRUMENT, MAGNETIC (GYROSCOPICALLY STABILIZED) · Magnetic Azimuth Detector · instruments and avionics
2006-01-26TSO-C9C · AUTOMATIC PILOTS · Position Sensors, Position Sensors, Position Sensors · other and general
2006-01-26TSO-C52B · Flight Director Equipment · Position Sensors, Position Sensors, Position Sensors · other and general

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.