https://patentbrief.org/company/wham-o-manufacturing-co Plain-English explanations of patents assigned to Wham O Manufacturing Co, newest first. en-us Sat, 13 Jun 2026 10:14:06 GMT https://patentbrief.org/patent/us/3359678/frisbee-flying-disc A 1967 patent describing the specific aerodynamic shape and raised ribs that allow a plastic disc to fly straight and steady. Tue, 26 Dec 1967 00:00:00 GMT https://patentbrief.org/patent/us/3359678/frisbee-flying-disc