4 Stroke ICE (Otto Cycle)
Diesel Engine (Diesel Cycle)
Scientific pregnancy test
Rigid Airship (Zeppelin)
Rotary Engine (first prototype, not design)
Turbojet (to some extent, independent collective work of many)
EM Waves / X-Rays
1: omg Collien Fernandes is so hot
2: she was engineered in Germany, what can u expect?
1: ...that's the gayest thing u've ever said.