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

Zero Gravity Corporation

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Boeing 727. FAA spelling: Zero Gravity Corporation.

Approved modifications 2 · newest first

Boeing 727 2
2017-11-02ST03974NY · Installation of an Accelerometer (Advanced Gravity Level Indication System -AGLIS) · 727-200 Series
2012-05-21ST01051LA · Installation of a modified hydraulic system and a vertical rate indication system for parabolic flight and interior... · 727-200 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.