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

Comet Copters

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Bell 47. FAA spelling: Comet Copters.

Approved modifications 2 · newest first

Bell 47 2
1960-01-01SH4-1499 · Exhaust mufflers. · 47 Series, 47 Series, 47 Series
1960-01-01SH4-1392 · Pesco 1P-677 hydraulic pump. · 47 Series, 47 Series, 47 Series

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.