Your search National Labor Relations Board, Petitioner, v. Local No. 12, International Union of Operating Engineers,afl-cio, Respondent,andoperating Engineers Health and Welfare Fund, Operatingengineers Pension Trust, Operating Engineersvacation-holiday Savings Trust, Operating Engineers Trainingtrust, Southern California Operating Engineers Benefitsadministration, Inc., and Leo J. Majich, Respondents.maas & Feduska, Inc., Petitioner, v. National Labor Relations Board, Respondent,andlocal No. 12, International Union of Operating Engineers,afl-cio, Intervenor,andoperating Engineers Health and Welfare Fund, Operatingengineers Pension Trust, Operating Engineersvacation-holiday Savings Trust, Operating Engineers Trainingtrust, Southern California Operating Engineers Benefitsadministration, Inc., and Leo J. Majich, Intervenors Andcross-petitioners did not match any document.