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
CA 20255
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.)
HAROLD ROBERT GRUNDER
WILLIAM RIDGEWAY WHITEHEAD
Original Assignee
HAROLD ROBERT GRUNDER
WILLIAM RIDGEWAY WHITEHEAD
Publication date
Priority to CA 20255priorityCriticalpatent/CA20255S/en
Application grantedgrantedCritical
Publication of CA20255SpublicationCriticalpatent/CA20255S/en