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Individual
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Individual
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Priority claimed from US00344516Aexternal-prioritypatent/US3805902A/en
Application filed by IndividualfiledCriticalIndividual
Priority to CA232,049ApriorityCriticalpatent/CA987662A/en
Application grantedgrantedCritical
Publication of CA987662ApublicationCriticalpatent/CA987662A/en
CA232,049A1973-03-261975-07-23Method of transferring a stand of drill pipe from a vertical pipe racking tower to a well-drilling derrick
ExpiredCA987662A
(en)