Wikipedia:Articles for deletion/Walt Langendorfer
Seems like a notable inventor. passes . https://www.google.com/search?q=Walt+Langendorfer+gas+piston&rlz=1C5CHFA_enUS655US655&source=lnms&sa=X&ved=0ahUKEwj8vNaa4p7kAhVyhq0KHelNBFAQ_AUICSgA&biw=1012&bih=725&dpr=1 Look at the search here. Perhaps investigate  
— User:Wm335td, 19:38, 25 August 2019 (UTC)
Stance: comment
Cited policy: WP:ANYBIO||WP:PRESERVE||WP:ATD (Wikipedia:Notability)