Woodland took some stock market earnings, quit his teaching job and moved to his grandfather's Florida apartment. While at the beach, Woodland again considered the problem, recalling, from his Boy Scout training, how Morse code dots and dashes are used to send information electronically. He drew dots and dashes in the sand similar to the shapes used in Morse code. After pulling them downward with his fingers, producing thin lines resulting from the dots and thick lines from the dashes, he came up with the concept of a two-dimensional, linear Morse code, and after sharing it with Silver and adapting optical sound film technology, they applied for a patent on October 20, 1949, receiving "Classifying Apparatus and Method" on October 7, 1952, covering both linear barcode and circular bulls-eye printing designs.