Document daNB7bnZ8XYO3BqJB6GBQ29E6

.''Ml? ^Abrasive Grata Association ' HH Allegheny Ludlum Indaiirltt, Inc. HJ* Allied Chemical Corporation 1736 Aluminum Campta; of America 1769 Aluminum Company o( Canada, Ltd. 194? American Can Company 3771 American Fooadrymen's Society M1B American Insurance Aaaoclatlon , 1944 American troo and Steel Inolitute ' '195? American Metal Cl (man, Inc. , 1917 American Mining Congress 1945 eAmcrican Mutual Insurance Alliance . 1944 American Optical Corporation 1967 American Petroleum Institute 1916 ASA RCO Incorporated 1969 American TeMile Mfrs- Institute, Inc. 1966 ARCO/Polymers, Inc. 1970 Artonaut Ineursnce Company f9?4 BASF Wyandotte Corporation 1970 The Bahneon Company 4 1944 1955 Broth Wellman, Im. CPC International, Inc- 1951 Can Manufacturers.Institute, Inc. 1951 Celaneee Corporation 1971 eCeiiientcd Carbide Producere Asen, I960 Certain-Ten St. Cobain Inaulatien Corp. -1974 Chrysler Cat rotation 1996 Ciba-Getur \C 1974 Cult Industrie* Inc.... 1971 Cniumoia Gaa System Service Corporation ,1979 Commercial Shearing, Inc. I99H 1 )1979 ^ 1971 Companhia Siderustica Nacional Consolidated Edison Co. of Ness York, Inc. Consolidated Natural Gas Service Company 1975 j . Consolidation CuaJ Company. Inc. 1979 i. O'Appuluoie Consulting Engineers, inc. 1974 | UrSoto, inc. . 1991 ! Diamond :ihamroch Corporation 197? Uuw Caeinina; U.5.A. ' 1917' Uraksnfeld Division, Hercules, Inc. 1947 | Orao Curpuratiun ' 191b . E. 1. du Pom do Nemours h Company 1966 Eastman Kodak Company MTt , Minerals A ChemicsU Division, Pngelhard Minerals b Chemicals Corp. 1979 1 Epi* Metal# Corporation >996 Equitable Ur Assurance Society oI U.S. (964 Esaon Corporation 1971 rsUan Foundry Company 1974 Foetorta Clara Company >9>b Foundry Supply ManuUclursrs Croup 1976 General Cigar Gompaay. Inc. I9*T Clear rat Electric Company 1991 General Mills, Inc. 1941 1974 General Minors Corporation General Hr/ractorles Ctnnpany r,, 1994 Ceorgta Kanltn Cumpany 1917 1950 Mil 1972 1971 1917 1975 1947 1970 1974 M56 1959 1955 1974 1942 1970 1968 1974 1917 1966 1970 1957 1965 1974 1956 1974. 1975 1956 1957 1974 1973 1972 1953 1936 1937 1917 1972 1975 1970 5938 1970 1973 1968 1937 1972 1971 1917 1956 1956 1971 1974 1972 1974 1956 1975 `Grinding Wheel Institute Coil Oil Corporation Hall China Company Heins U.S. A. (Dtv. of H. J. Heins Co. I Howell Industrial Clinic Huntington Alloys, Inc. Industrial Casket b Shim Co., Inc- ^gr/soll-JUndiCompany Jr.. . Inland Steel Company IBM Corporation International larad Zinc Research Org. International Technical Information Inst. Johns.ManviUe Corporation Jones 6 Laughlln Steel Corporation - Kawecki Berylco Industries, Inc. . Kopp Class. Inc. 'Hoppers Company. Inc. 'Laclede Steel Company Homer Laughlln Chins Company . Lenox Crystal, Inc. ;;; J. S. McCormick Company Marcena Mining Company Marion Health b Safety, joe. 'Metropolitan Life Insurance Company Julies Laboratories. Inc. Mllllken Brick Company Mine Safety Appliances Company Mobay Chemical Company Monongahela Iron b Metal Compaay, Inc. Motor Vehicle Mfra. Asaa. ofU.S.. Inc. NL Industries, lac. National Annealing Boa Company National Forge Company Organisation Resources Counselors, Inc. Owens-Cornlng 7'lberglas Corporation Owens-Illinois, Inc. PPG Industries, Inc. Pennsylvania Class Sand Corporation Peoples Natural Cas Compaoy Pittsburgh b Lake Erie Railroad PneumafU Corporaiion Portland Cement Association Potters Industrie*, Inc. " Pullman. Slondard Raybesios-Manhauan, Inc. H. H. Robertson Con,pny Safety First IndusirI"*, Inc. The Sager Glove Corporation St. Joe Mineral* Corporation' Ssuereiacn Cements Company Seattle Services division. Cl.n Doeing Ce Selenium-Tellurium Development Assn- . In Sharon Steel Corporation Shell Oil Company Shenango Ini rporai>-d Soap and Oeicrgciti Amin ihiu.n The Standard Oil Company Mollipli- Mt ii.ii. rnip ) :v * * C err rr.