To pick up on one point you make:
We own patents to unique products, our customers just sell them, you list their site but not ours because it's not unique enough.
I've not looked at your site, in fact I haven't tried to identify it, but if this is the case
and all the sites have been reviewed, my conclusion would be that the sites do not adequately explain the relationship.
If you own the patents, presumably you are a business that either deals in intellectual property or actually manufactures something.
If your site is about that business, it would belong in the Business tree (or in Regional at the place of business, or sometimes both).
If your site sold the items you own patents for - you offered a way for people to remotely order the items in retail quantities, and offered international shipping the site would belong in Shopping, not Business, (and again possibly Regional at the place of business, or sometimes both).
If you only wholesale the goods to someone else who retails them your site might be listed in Business, while your customer would be listed in Shopping.
If you offer dropshipping to your customers, you might be listed as a Business, but your customers site would not be listable as they do not sell the goods, but act as intermediarys (take orders on your behalf which you fulfil).
If both you and your customers sell the same item(s) we are not helping our users by offering them multiple sites selling the same thing (that's why they use a directory rather than the overloaded search results (at least we hope so)). Make it clear *on your site* who actually owns the right to manufacture/distribute/wholesale/sell (pick those that apply)
Please note this is not an exaustive list of reasons/possibilities/guidelines, nor does it try to fill all the exceptions that permeate all areas of life, including directory listings, but should be interpreted as a broadbrush overview as I see it.