I would guess Consumer Reports. My understanding though is that the technology is already under a patent and the manufacture of same is a license. You just get a different box with the manufacturers label and a bunch of marketing hype.

"Consumer Reports" is always a good source, provided you take its recommendations with a grain of salt. Some of their rankings and recommendations are not as reliable as I would like to see and they take the position that all mid-priced video equipment produces the same image quality and audio equipment all sounds about the same. This is not correct, but is likely to be the case for a broad segment of consumers. The other poster discussed patents, some of which do apply to plasma television technology. However, even if a company 'B' licenses a design from company 'A', the patent holder, there is no guarantee that both products are built to the same quality. Other parts of the equipment that do not share the same patented elements will differ in circuit design, component quality, and build quality. All boxes are not the same on the inside. Examining the reliability ratings in "Consumer Reports" of products from different companies will demonstrate this. Equipment that fails more often may suffer from a less robust design, lower-quality components, lower-quality production methods, reliability problems caused by cost-reduction policies, inferior quality control, a poorly-trained workforce, or any of many similar reasons. One thing to check is the warranty period offered by the manufacturer. This is a good indication of product quality and manufacturer support. A long warranty does not mean that your unit will not break down, but it does mean that the manufacturer believes their products are reliable enough and good enough to warrant this level of customer support. Any consumer electronics with a warranty period of less than one year should be avoided. Products with a one-year warranty are liable to be better, but not by much. I usually look for a two-year warranty at the very least on any mass-market consumer electronics I buy. Most of the products I own from lower-volume manufacturers come with a five-year warranty. One audio manufacturer, for example, offers a 20-year transferable warranty. You will pay more for a product from a company that offers a long warranty, but you will find the quality of the product is much better and it will last for much longer than discount consumer products. Inexpensive consumer goods can cost more over the long term (e.g., 20 years), because they have to be replaced or repaired more frequently. Most of these products are not available from big-box retailers, but from small, specialty retailers. Don't go shopping with cost as the main criteria, although it is important to set a budget in advance and stick to it. If you don't, at least know by how much you can safely exceed your budget. Many products are marketed with an inflated retail price, so that they appear to be heavily discounted when you go shopping. This gives the buyer the sense they have received a great deal, while the retailer earns their expected profit. Products from low-volume manufacturers are rarely discounted, because they have put their effort into the product design and production, rather than marketing. A product marked with a $500 manufacturers suggested retail price (MSRP) and offered by a retailer at their "normal" price of $300, might only cost them $100 to $150. They would likely let you dicker them down to $250. A happy customer and a decent profit helped by a bit of a fancy footwork.