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Oak Industries

Contents

Overview

The output from Oak Industries included printed circuit boards, discrete keyboard and calculator switches and full membrane keyboard assemblies. The Oak logo can be found on the PCBs of a number of keyboards, including those of most BBC Microcomputers; this is somewhat misleading as it can lead people to think that Oak made the entire keyboard. (Another PCB manufacturer whose PCBs are branded is Sung Wei, who made many PCBs for Datacomp.)

History

Oak keyboards and keyboard switches have been produced under a number of Oak brands:

Oak are now Oak-Mitsui. However, the switch division is now owned by Electroswitch. The FTM patent, and the N-key rollover patent for FTM, filed in 1980 and 1981 respectively, passed to Zenith Electronics Corporation in 1989, suggesting that Zenith took over the keyboard division.

Switches

Patents

The following patents are not specific to any switch series; switch patents are documented under the individual switch series pages.

Patent Title Filed Published Notes
US 4792376 Apparatus for the sublimation printing of keyboard caps 1987-07-27 1988-12-20