Granted Patent
Utility
US 6,213,598 · App. 09/248,934
Pressure control device
Inventors:
I. C. Hou, Chi-Chien Lin
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Feb 12, 1999
Inventors
I. C. Hou
Chi-Chien Lin
Assignee (at issue)
Industrial Technology Research Institute
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.