Another patent issued

Another patent filed, originally uploaded by epredator.

I do a fair few patent disclosures at IBM. Some of them get filed, but after a few years some get issued. You then get a plaque of the patent (or part of it). Its usually so long ago, and in such obscure legalize that its hard to remember what the original idea was.
This one arrived today, and, not being able to read chinese it has made it my most unusual work plaque.