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
CA590362A
Inventor
Felton William
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.)
DAVID CRABTREE AND SON Ltd
Original Assignee
DAVID CRABTREE AND SON Ltd
Publication date
Application grantedgrantedCritical
Publication of CA590362ApublicationCriticalpatent/CA590362A/en