Your caption is so interesting, HemNorth! I hadn't heard of the legal dispute, but will now look it up. Rozanne is a favourite for me, not only beautiful but it blooms here for about seven months of the year. It was voted plant of the millennium a few years back; I have lots of it in our garden in England. But I've not come across Jolly Bee - perhaps because of the outcome of the court case? Does it bloom for as long?

It doesn't seem to bloom as long as Rozanne, but I only had it for two seasons, and then it petered out - or I should say, something grew over top of it and kind of smothered it before I realized what had happened.

I believe the breeders of Rozanne felt it was too similar to their plant. I'm not sure which reached the market first.
If you search for Aberdeen Gardening - Geranium Jolly Bee - I'm sure that information will come up.
Also if you search for Geranium Jolly Bee versus Rozanne, you'll come up with some information. Dave's Garden has some information about Blooms of Bressingham having done a DNA match to find out they were the same? I think that's right.
Good luck following it up.