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
CA812600A
Inventor
H. Nervig Charles
J. Theodore George
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.)
American Greetings Corp
Original Assignee
American Greetings Corp
Publication date
Application grantedgrantedCritical
Publication of CA812600ApublicationCriticalpatent/CA812600A/en