Granted Patent
Utility
US 4,836,752 · App. 07/115,702
Partial restriction detector
Inventor:
David H. Burkett
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Nov 2, 1987
Inventor
David H. Burkett
Assignee (at issue)
Fisher Scientific Company, L.L.C.
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.