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

Marconi Italiana S.P.A.

Named as the FAA publishes it on its approvals.

Approved to make 2 classes of equipment. FAA spelling: Marconi Italiana S.P.A..

Equipment approvals technical standard order authorisations

1994-01-01TSO-C37C · VHF RADIO COMMUNICATION TRANSMITTING EQUIPMENT OPERATING WITHIN 117.975 TO 136.000 MEGAHERTZ · *, * · instruments and avionics
TSO-C38C · Vhf Radio Communications Receiving Equipment Operating Within 117.975 To 136.000 Megahertz · *, * · 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.