# Keystone Aircraft

> defunct American airplane manufacturer

**Wikidata**: [Q1740353](https://www.wikidata.org/wiki/Q1740353)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Keystone_Aircraft)  
**Source**: https://4ort.xyz/entity/keystone-aircraft


## References

1. Freebase Data Dumps. 2013
2. United States Naval Aviation 1910-2010 Volume II Statistics