Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Struthers Wells Corp
Original Assignee
Struthers Wells Corp
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 GB1442959Aexternal-prioritypatent/GB890811A/en
Application filed by Struthers Wells CorpfiledCriticalStruthers Wells Corp
Priority to FR793695ApriorityCriticalpatent/FR1230060A/fr
Application grantedgrantedCritical
Publication of FR1230060ApublicationCriticalpatent/FR1230060A/fr