Patents

US No. 4,171,233: "Lens Quality of Die Steel," October 16, 1979

US No. 4,287,007: "Steel Composition Chipper Knife," September 1, 1981

US No. 4,353,743: "Steel Composition for Chipper Knife," October 12, 1982

US No. 4,353,756: "Method of Heat Treating a Steel Composition for Chipper Knife," October 12, 1982

Canadian Patent No. 1,149,198: "Lens Quality Die Steel," July 5, 1983

US No. 6,224,474: “Magnetic Disc System for Grinding or Polishing Specimens,” May 1, 2001

Log in to your account or