Source: Photo by Sandstein - File:Epson HX-20 in case - MfK Bern.jpg - Wikimedia Commons

Wikipedia: Epson HX-20

The Epson HX-20 (also known as the HC-20) was the first "true" laptop computer. It was invented in July 1980 by Yukio Yokozawa, who worked for Suwa Seikosha, a branch of Japanese company Seiko (now Seiko Epson), receiving a patent for the invention.

Seen on Functional object - Object, Epson, Epson portable computer, 1980-1989