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
CA879215A
Inventor
L. Y. Dubuisson Bernard
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.)
Francaise D'optique Et De Mecanique Sfom Ste
Original Assignee
Francaise D'optique Et De Mecanique Sfom Ste
Publication date
Application grantedgrantedCritical
Publication of CA879215ApublicationCriticalpatent/CA879215A/en