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

Northwest Propeller INC

Holds 2 approved modifications. FAA spelling: Northwest Propeller Inc.

Approved modifications 2 · newest first

1960-01-01SPW-2 · Modification of Hamilton Standard4A2-V5 propeller governor to NWP-D18 on aircraft with Pratt & Whitney R-985 engines. · HC-93Z
1960-01-01SPW-3 · Modification of Hamilton Standard4A2-V5 propeller governor to NWP-D18 on aircraft with Pratt & Whitney R-985 engines. · HC-B3Z

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.