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.)
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.)
RIGGIN ABRAM A
RIGGIN WILLIAM M
Original Assignee
RIGGIN ABRAM A
RIGGIN WILLIAM M
Publication date
Application grantedgrantedCritical
Publication of CA14730ApublicationCriticalpatent/CA14730A/en