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
CA842176A
Inventor
B. Sawyer Charles
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.)
SAWYER RESEARCH PRODUCTS
Original Assignee
SAWYER RESEARCH PRODUCTS
Publication date
Application grantedgrantedCritical
Publication of CA842176ApublicationCriticalpatent/CA842176A/en