personally I am investing in domains as below to protect branding for my new products some info below.
Since the discussion seems to have wandered from patent to trademark, I think it's prudent to add a few comments about branding:
Be VERY WARY of plunging ahead to protect branding via domain name without first checking with a trademark attorney. Just because you get approved for a domain name doesn't mean you're safe to use that domain name under the trademark laws.
There are many myths out there about what it means to brand a product.
First, understand that your brand is your trademark, and the standard for infringement of trademarks is whether or not there will likely be consumer confusion between your brand and an existing one. Also, trademarks do not have to be registered to exist, in the U.S. So just because your proposed brand isn't registered as a trademark doesn't mean it's free to use.
Furthermore, trademarks do not have to be identical to infringe--just need to be similar enough to make confusion likely. By the same token, brand names can be identical and not infringe, if the businesses are so different that relevant consumers aren't likely to think the products/services are from the same source.
And another important note re choice of brand name: Many people think it's advantageous to think up a clever name for their new product and use that both as the brand and the name of the product itself. WRONG! If the product is new, and there's no generic name for it, guess what happens to your clever name? It can become the generic term for that product and LOSE it's ability to serve as a trademark. ("Aspirin" used to be a brand name in the US owned by Bayer, now it's a generic term that any company can use.)
Before selecting a product name, a trademark, or a business name (trade name), hire a trademark attorney to consult or, if you can't afford one, spend some time reading and learning about trademarks. Otherwise you risk wasting your time and money on a mark that won't fly or, worse, will involve you on the wrong end of an infringement suit.