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
CA697293A
Inventor
G. Sprigings Donald
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.)
HK Porter Co Inc
Original Assignee
Donald G Sprigings
HK Porter Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA697293ApublicationCriticalpatent/CA697293A/en