Home » Unearthed Mazda Patent Points To Possible Return Of Rotary Engine, Also Highlights Novel Hybrid System » mazda-rotary-engine-hybrid-patent (4) mazda-rotary-engine-hybrid-patent (4) Home » Unearthed Mazda Patent Points To Possible Return Of Rotary Engine, Also Highlights Novel Hybrid System » mazda-rotary-engine-hybrid-patent (4)