U.S. Design Patent 290,256 (USD290256S)

Provided by the ASK Keyboard Patents database

A patent drawing of IBM's Portable computer from a front-right perspective
Google Patents
NamePortable computer
InventorsRichard F. Sapper
AssigneesIBM
DescriptionAn ornamental design depicting an IBM 5140 PC Convertible and its integrated keyboard assembly using Alps SKCM "Brown" and SKCL Compact keyswitches.