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Priority to JP6442788UpriorityCriticalpatent/JPH01171717U/ja
Priority to US07/313,681prioritypatent/US4974743A/en
Priority to DE3943711Aprioritypatent/DE3943711C2/de
Priority to DE3943710Aprioritypatent/DE3943710C2/de
Priority to DE3905611Aprioritypatent/DE3905611C2/de
Publication of JPH01171717UpublicationCriticalpatent/JPH01171717U/ja