Who is known for inventing the first practical portable CD player?

First practical electric wheelchair was invented by?

Who is credited with inventing the first practical solar cell?

Which inventor is associated with the development of the first practical electronic calculator?

Who is known for inventing the first practical artificial skin?

Which inventor is credited with inventing the first practical steam locomotive?

Who is credited with inventing the first practical magnetic resonance imaging (MRI) scanner?

Which inventor is associated with the development of the first practical electric hair dryer?

Who is known for inventing the first practical electric refrigerator?

Who is known for inventing the first practical automatic coffee maker?