Talkin' 'Bout My Innovation

In the late 1980s, due to the software patent craze, Autodesk was in a mode of patenting everything we could think of in order to build up a portfolio of patents to use defensively if somebody came against us with a (probably) bogus patent. My contribution was a means for computing with physical units which I'd just implemented in a rudimentary form for AutoCAD. Here is the original disclosure of this invention and the U.S. patent was it was granted more than four years later.