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.)
J ARTHUR GROSS
JOHN H SHAFER AND OLIN J SHAFER
Northern Trust Co
Original Assignee
J ARTHUR GROSS
JOHN H SHAFER AND OLIN J SHAFER
Northern Trust Co
Publication date
Application grantedgrantedCritical
Publication of CA583211ApublicationCriticalpatent/CA583211A/fr