deskthority

http://www.nightfallcrew.com/24/07/2013 ... rd-repair/

I've see a similar-shaped switch in an Alps patent that uses this side design for plate spring, but I am not sure I've seen a patent for a side dome switch yet. (Not all Alps switches appear to have US patents — SKFL is cited in another Alps patent as prior art instead of a patent citation, so I presume they never patented SKFL in the US.)

Not Alps. I have it on good authority (from Microbee themselves) that they're [wiki]Jelco JKS-91[/wiki]. I hope to have some reference material within a few weeks.

Jelco appear to have been a Japanese company, who seem to have since vanished.