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.)
Expired
Application number
CA092389A
Inventor
W. Hutchings Ronald
H. Stringham Charles
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.)
R T FRENCH Co
Original Assignee
R T FRENCH Co
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
Application filed by R T FRENCH CofiledCriticalR T FRENCH Co
Priority to CA092389ApriorityCriticalpatent/CA921322A/en
Application grantedgrantedCritical
Publication of CA921322ApublicationCriticalpatent/CA921322A/en