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Priority claimed from GB888821957Aexternal-prioritypatent/GB8821957D0/en
Application filed by Margaret Pamela Richardson, Philip RichardsonfiledCriticalMargaret Pamela Richardson
Priority claimed from EP89309520Aexternal-prioritypatent/EP0368456B1/de
Application grantedgrantedCritical
Publication of ATE105098T1publicationCriticalpatent/ATE105098T1/de