Which inventor is credited with inventing the first practical photocopier?

Who is known for inventing the first practical electric vacuum cleaner?

Which inventor is associated with the development of the first practical microwave oven?

Which inventor is associated with the development of the first practical pacemaker?

Who is credited with inventing the first practical wind turbine?

Who is credited with inventing the first practical GPS navigation system?

Who is credited with inventing the first practical lithium-ion battery?

Which inventor is known for developing the first practical artificial intelligence computer program?

Who is credited with inventing the first practical digital wristwatch?

Which inventor is known for developing the first practical 3D printer?