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
CA862416A
Inventor
J. Pierman Martin
A. Ernst Otto
W. Donath Edwin
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.)
ILLINOIS TESTING LABORATORIES
Alnor Instrument Co
Original Assignee
ILLINOIS TESTING LABORATORIES
Alnor Instrument Co
Publication date
Application grantedgrantedCritical
Publication of CA862416ApublicationCriticalpatent/CA862416A/en