A tank shaped like a metal ball? The Kugelpanzer was one of Nazi Germany’s oddest inventions—built once, seen rarely, and ...

From shaving machines to yodel meters: 26 bizarre inventions from throughout history Hundreds of thousands of patents are issued by the U.S. Patent and Trademark Office for new inventions every year.

Rather than letting these designs get lost to time, Stacker compiled a list of 30 bizarre inventions from throughout history using archival photos from Getty. These black-and-white images are not just ...