Monopoly Committee told Ball Fruit Jar Corp. is protected patents. Washington, D.C., Dec. 15. The manufacturer of mason fruit jars, Frank C. Ball of Muncie, Ind., today told the Monopoly Investigating Committee that his contract for patented glass-making machinery prevents issuance of licenses to new fruit jar manufacturers. He said the contract, with the Hartford Empire Company, owner of Vital Glass-Making Machinery Patents, was taken out in 1932 carrying a provision that Hartford would grant no further licenses for domestic fruit jar manufacture beyond those then in effect, 12/15/38