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
CA688507A
Inventor
L. Persons Richard
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.)
ALPHA CONTROLS CORP
Original Assignee
ALPHA CONTROLS CORP
Publication date
Application grantedgrantedCritical
Publication of CA688507ApublicationCriticalpatent/CA688507A/en