The Guardian Angel was not an original invention. Maybe for Chavez, but not for the market. Even first season judge Doug Hall wrote the same thing in his blog and wrote that he already designed something similar for a client. See the blog entry here
. Despite the low-grade reading comprehension displayed by someone else here, it's obvious Doug says he would prefer a Halon device, not that he designed a Halon device for that client.
Many users here have already pointed out patents dating back decades for similar systems. At least one inventor with an unexpired patent has threatened to sue Chavez for infringement if he tried to bring it to market and may be in the process of doing so as we speak.