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
CA663792A
Inventor
D. Webb Derrel
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.)
DAVID A BRITTON
JAY W COLVIN JR
REA BRITTON
Original Assignee
DAVID A BRITTON
JAY W COLVIN JR
REA BRITTON
Publication date
Application grantedgrantedCritical
Publication of CA663792ApublicationCriticalpatent/CA663792A/en