Chandelor v Lopus Chandelor v Lopus Chandelor v Lopus (1603) 79 ER 3 is a famous case in the common law of England. It stands for the distinction between warranties and mere affirmations and announced the rule of "caveat emptor" (buyer beware). A man paid £100 for what he thought was a bezoar stone. This is a stone that forms in animals' intestinal systems, and was believed to have magical healing properties. The seller said it was a bezoar stone, which turned out to be false. The buyer sued for the return of the £100 purchase price. How the claimant discovered that the
Patent caveat as the proposed patent, the Patent Office notified the holder of the caveat, who then had three months to submit a formal patent application with claims. If the two patent applications claimed the same invention, an interference would then be declared and neither patent could be issued until it was determined which was the first to invent. Perhaps the most famous example of such a conflict was on 14 February 1876, when Elisha Gray filed a patent caveat and Alexander Graham Bell filed a patent application on the same day, both relating to the telephone. Gray ended up abandoning his