Official Gazette of the United States Patent Office
United States. Patent Office
Columbus, Peter Spiros, and Erikson, Carl Reinhold, 3,442,845. Dickstein, Jack, Cooperman, Isadore Nathan, and Cesanek, James John, 3,442,831. Hoyt, Howard E., and Pfluger, Helmuth L., 3,442,674. Sandler, Stanley Robert, Berg, ...