https://patentbrief.org/company/amgen-inc Plain-English explanations of patents assigned to Amgen Inc, newest first. en-us Mon, 15 Jun 2026 05:59:45 GMT https://patentbrief.org/patent/us/5574018/herceptin-trastuzumab A method for attaching therapeutic proteins to Vitamin B12 so they can be absorbed through the gut instead of being injected. Tue, 12 Nov 1996 00:00:00 GMT https://patentbrief.org/patent/us/5574018/herceptin-trastuzumab