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
CA659375A
Inventor
A. Anderson Julius
R. Currier Raymond
Original Assignee
Pittsburgh Plate Glass Co
Publication date
Application grantedgrantedCritical
Publication of CA659375ApublicationCriticalpatent/CA659375A/en