Granted Patent
Utility
US 5,658,644 · App. 08/567,747
Light weight board of improved mechanical strength and manufacture thereof
Inventors:
Ding-Shyan Ho, Jyh-yao Raphael Li
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Dec 5, 1995
Inventors
Ding-Shyan Ho
Jyh-yao Raphael Li
Assignee (at issue)
INTEPLAST GROUP CORPORATION
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.