Granted Patent
Utility
US 4,858,385 · App. 07/127,478
Seals
Inventor:
Robert G. Bright
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Dec 2, 1987
Inventor
Robert G. Bright
Assignee (at issue)
Draftex Industries Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.