Just out of interest, I'm trying to figure out what the microcontroller is that's used on the Subaru key fob. The markings, on three separate lines, are 4144, 093, 04?E
The ? is illegible, but most likely a 6.
The device is a 20 (yes, 20) pin SOIC, and it clearly wasn't a dedicated chip - some of the pins aren't used at all, and others are only connected to test or programming points.
It must contain some EEPROM, and one thing that struck me was that the power and ground pins are placed in the centre of one side (e.g. pins 5 and 6).
Bearing in mind that this must have already existed in the year 2000, does it ring any bells?