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

Aviation Products Development

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Cessna 140. FAA spelling: Aviation Products Development.

Approved modifications 2 · newest first

Cessna 140 1
1993-04-09SE5941NM · Replacement of original engine oil screen with external mounted full flow oil adapter and spin-on filter. · C90-12F, C90-14F
1993-04-09SA5942NM · Installation of an oil filter, filter base and mounting plate on firewalls of aircraft equipped with an approved... · 140

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.