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Application filed by Hirsch PlastikfiledCriticalHirsch Plastik
Priority to AT261777ApriorityCriticalpatent/ATA261777A/en
Priority to DE19777724358prioritypatent/DE7724358U1/en
Priority to FR7726858Aprioritypatent/FR2387572A7/en
Publication of ATA261777ApublicationCriticalpatent/ATA261777A/en
Composite plastics board for making box file - has corrugated central layer covered by smooth outer layers of plastics and has perforated lines to form box spine