https://patentbrief.org/company/farbenfabriken-of-elberfeld-co Plain-English explanations of patents assigned to FARBENFABRIKEN OF ELBERFELD Co, newest first. en-us Sat, 13 Jun 2026 10:18:01 GMT https://patentbrief.org/patent/us/644077/aspirin-acetylsalicylic-acid The 1900 patent for acetylsalicylic acid, the chemical compound that became the world's most common pain reliever, known as Aspirin. Tue, 27 Feb 1900 00:00:00 GMT https://patentbrief.org/patent/us/644077/aspirin-acetylsalicylic-acid