IN142587BIN2153/CAL/1976AIN2153CA1976AIN142587BIN 142587 BIN142587 BIN 142587BIN 2153CA1976 AIN2153CA1976 AIN 2153CA1976AIN 142587 BIN142587 BIN 142587B
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Priority claimed from US392628Aexternal-prioritypatent/US3871486A/en
Application filed by Bakerdrill IncfiledCriticalBakerdrill Inc
Priority to IN2153/CAL/1976ApriorityCriticalpatent/IN142587B/en
Publication of IN142587BpublicationCriticalpatent/IN142587B/en