Granted Patent
Utility
US 5,575,113 · App. 08/574,762
Door guard rail structure
Inventor:
Li-chu Chen Huang
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Dec 19, 1995
Inventor
Li-chu Chen Huang
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.