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
CA841302A
Inventor
Shiao-Ming Hsu Sam
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.)
Proof Lock International Inc
Original Assignee
Proof Lock International Inc
Publication date
Application grantedgrantedCritical
Publication of CA841302ApublicationCriticalpatent/CA841302A/en