Home » Unearthed Mazda Patent Points To Possible Return Of Rotary Engine, Also Highlights Novel Hybrid System » mazda-rotary-engine-hybrid-patent (1) mazda-rotary-engine-hybrid-patent (1) Home » Unearthed Mazda Patent Points To Possible Return Of Rotary Engine, Also Highlights Novel Hybrid System » mazda-rotary-engine-hybrid-patent (1)