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.)
PATTERSON-KELLEY Co
Original Assignee
PATTERSON-KELLEY Co
Publication date
Application grantedgrantedCritical
Publication of CA468951ApublicationCriticalpatent/CA468951A/fr