Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/209,698external-prioritypatent/US4921409A/en
Application filed by Ingersoll Dresser Pump CofiledCriticalIngersoll Dresser Pump Co
Application grantedgrantedCritical
Publication of ATE101689T1publicationCriticalpatent/ATE101689T1/de