financial patents in the arts of bank notes (2 patents), bills of credit (1), bills of exchange (1), check blanks (4); detecting and preventing counterfeiting (10), coin counting (1), interest calculation tables (5), and lotteries (17). On the other hand, cases such as Hotel Security Checking Co. v. Lorraine Co., 160 F. 467 (2d Cir. 1908), which held that a bookkeeping system to prevent embezzlement by waiters was unpatentable, were often read to imply a "business method exception", in which business methods are unpatentable. Another such case was Joseph E. Seagram & Sons v. Marzell, 180 F.2d 26 (D.C. Cir. 1950), in which the court held that a patent on "blind testing" whiskey blends for consumer preferences would be "a serious restraint upon the advance of science and industry" and therefore should be refused. The change in practice in the 1990s For many years, the USPTO took the position that "methods of doing business" were not patentable. With the emergence in the 1980s and 1990s of patent applications on internet or computer enabled methods of doing commerce, however, USPTO found that it was no longer practical to determine if a particular computer implemented invention was a technological invention or a business invention. Consequently, they took the position that examiners would not have to determine if a claimed invention was a method of doing business or not. They would determine patentability based on the same statutory requirements as any other invention. The subsequent allowance of patents on computer implemented methods for doing business was challenged in the 1998 State Street Bank v. Signature Financial Group, (47 USPQ 2d 1596 (CAFC 1998)). The court affirmed the position of the USPTO and rejected the theory that a "method of doing business" was excluded subject matter. The court further confirmed this principle with AT&T Corp. v. Excel Communications, Inc., (50 USPQ 2d 1447 (Fed. Cir. 1999)). The USPTO continued to require, however, that business method inventions must apply, involve, use or advance the "technological arts" in order to be patentable. This was based on an unpublished decision of the U.S. Board of Patent Appeals and Interferences, Ex Parte Bowman, 61 USPQ2d 1665, 1671 (Bd Pat. App. & Inter. 2001). This requirement could be met by merely requiring that the invention be carried out on a computer. The reaction against business method patents after 2000 In October 2005 the USPTO's own administrative judges overturned this