Mike ....
When they write patents, the info that goes into the patent is what they measure the day they are collecting the data for the patent ... number of petals, bloom size, height, width, etc. Any of those plant characteristics can vary.
If you rose is happy where you've planted it, it's possible that it could get bigger. The patent says the plant habit for the rose is "spreading".
I have one rose that grows twice as tall and twice as wide as the breeder has ever seen it growing in any other garden. I guess you'd say, it's happy where I've got it sited. I am glad I gave it plenty of room.
Just food for thought.
Smiles,
Lyn