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
CA685809A
Inventor
F. Richards Arthur
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.)
RICHARDS SHEAR CO
Original Assignee
RICHARDS SHEAR CO
Publication date
Application grantedgrantedCritical
Publication of CA685809ApublicationCriticalpatent/CA685809A/en