Since he owns the trademark and (according to his other answers) the business doesn't seem to be legitimate, or even located in the address, that's what I would do as well.
I don't think this is the "correct" path. Google should be more open to requests, and try to be more understanding on users' requests.
Anyway, as I wrote in another comment the person behind this is either a normal person using his home address or someone working for another company located at that address.
This means that Google has assigned the ownership to him already. I couldn't find any way for requesting the ownership to the entry, but only a "ask the owner access to this entry" page.
Also, a business might exists in that address, but it's certainly not called like my blog.
Do you operate the blog as an individual? Meaning you don’t have any sort of business entity involved? If so maybe you could report a case of identity theft to your local police department and then send Google the police report via certified mail to their legal department along with a letter asking them to correct the information.
I thought google didn't really have any customer support or any humans involved in most things. It was all automated systems built by software engineers for the most part.
Sorry, I really meant to write "ask the current owner to get access to this entry". Meaning that I would need to ask the current owner to allow me to access the entry.
