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- Source is exactly "The William P. and Moya Olsen Lear Papers (2000-06-20), Box 28, Folder 5"
[William P. and Moya Olsen Lear Papers, Box 28, Folder 5 - Direction finders, 1926-1941]
![[William P. and Moya Olsen Lear Papers, Box 28, Folder 5 - Direction finders, 1926-1941]](https://digitalcollections.museumofflight.org/files/square_thumbnails/a5f7b3c272d7532d81e60ae1c605235d.jpg "[William P. and Moya Olsen Lear Papers, Box 28, Folder 5 - Direction finders, 1926-1941]")
Items from Box 28, Folder 5 of the William P. and Moya Olsen Lear Papers, 1926-1941. Contains patent documentation for various aircraft and radio systems: Joseph Dugan's synchronous bomb sight, Dugan's radio direction and position indicating system,…