Free images results:

Invention pictures, stock photos and images


Lamp Stock Photo
Author: Coleopter
Idea Royalty Free Stock Photos
Author: Penguinn
Cogwheels Stock Photos
Author: Artefy
Light bulb Royalty Free Stock Photo
Author: Fonats
Product Stock Image
Author: Sm1le

Also, here are some commercial RF-licensed images that match your search criteria:  

Explore more commercial options: More Invention Stock Illustrations & Vectors | More Invention Stock Video Footage