Z:gnu-www-ja-software-patents--5484d7-In fact, the situation is even/en

In fact, the situation is even more bizarre. There are in fact two patents covering the LZW compression algorithm. The patent office couldn't even tell that they were issuing two patents on the same thing. They couldn't keep track. There is a reason for this. It takes a while of study of these two patents to see that they really cover the same thing.