It is complex. The early patents have expired, so a bunch of companies wouldn't surprise me. I can't follow the chains, but it appears that there are not really a bunch of companies, it is one company (maybe two) that makes just the displays and sells to others.
It is complex. The early patents have expired, so a bunch of companies wouldn't surprise me. I can't follow the chains, but it appears that there are not really a bunch of companies, it is one company (maybe two) that makes just the displays and sells to others.