Granted Patent
Utility
US 6,183,445 · App. 08/947,443
Syringe with retractable needle guard
Inventors:
Per Lund, Knud Robert Petersen
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Sep 17, 1997
Inventors
Per Lund
Knud Robert Petersen
Assignee (at issue)
Radiometer Medical ApS
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.