Okay I'm not taking sides here... However, sa110, your general contractual question does not hold water. A signed contract is a signed contract. A contract is binding unless it is deemed outwith the norm.
Eg You take out a loan from a company and you didn't realise it is 1000% interest. This is plainly wrong and you would be a muppet to sign it, but people do and the law allows things like cooling off periods and also (I forget the exact term) the fact that the company is taking the P*SS.
Now I dont do this now, but for many years I negotiated deals with suppliers on a daily basis. A standard rep technique was to say that the deal was only available for a short time and I had to sign.
I always said. I will want that deal the next time I order even if it was outwith the timeframe. If not then you will not get a look-in for the next three months including my time for a visit. THis prevents them from being able to say to the area sales manager that they are fullfuilling their visits to our company. In 99% of cases I got the deal.
Now for a company negotiating IPR, who should have the advice of a good IPR/Patent lawyer to be rushed into a deal is just stupid and I'd be amazed if anyone did this (it only happens in the movies, like the thomas crown afair). All proper business meetings should have a preagenda a timeframe slot for AOB and a post-discussion time to sign (unless you want to sign there and then).