View source for A. & P. TEA CO. v. SUPERMARKET CORP., 340 U.S. 147 (1950)

== Situation ==
*In May of 1941 E.D. Turnham was granted a patent for a cashier counter that, when pushed or pulled, moves groceries deposited within it by a customer to the checking clerk via a three sided frame, or rack.
*Two previous courts, District and Appeals, found that the patent (and its three claims) was valid.
*The U.S. Supreme Court granted certoirari to review the case and determine whether previous courts "applied correct criteria of invention."
*Supermarket Corp. was the asignee of the patent, and they sued A&P Tea Co. for infringement of the patent

== Outcome ==
*The patent is invalid. The Supreme Court reverses the decisions of the previous two courts.

== Reasoning ==  
*Neither District or Appealate courts "has made any finding that the old elements which made up this device perform any additional function in the combination"
**Basically, the "invention" is just a combination of known elements, which together bring no new function - the device is simply an obvious extension of the previous art
**Merely extending the length of the grocery counter does not warrant patentablity
**Furthermore, a patent for a device that "only unites old elements...diminishes the resources available to skilled men" - there is no new contribution to science, so a patent would just inhibit widespread use of an ordinary thing
*The device is not patentable simply because it has has widespread commercial success - "commercial success without invention will not make patentability"
*Concurring opinion reitterates that this device could be made obviously by any "skilled mechanic or operator"