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
CA689846A
Inventor
Kirchner Willi
Braune Gerhard
Original Assignee
Kugelfischer Georg Schaefer and Co
Publication date
Application grantedgrantedCritical
Publication of CA689846ApublicationCriticalpatent/CA689846A/en