Granted Patent
Utility
US 5,256,151 · App. 07/973,556
Safety syringe with retractible needle holder
Inventor:
Bang Y. Chul
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Nov 9, 1992
Inventor
Bang Y. Chul
Assignee (at issue)
Mediverse, Inc.
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.