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
CA725522A
Inventor
Kupski Joseph
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.)
Chicago Hardware Foundry Co
Original Assignee
Chicago Hardware Foundry Co
Publication date
Application grantedgrantedCritical
Publication of CA725522ApublicationCriticalpatent/CA725522A/en