Granted Patent
Utility
US 5,677,089 · App. 08/548,302
Photomask for forming T-gate electrode of the semiconductor device
Inventors:
Byung-Sun Park, Yong-Ho Oh, Sang Soo Choi, Hyung-Joun Yoo
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Nov 1, 1995
Inventors
Byung-Sun Park
Yong-Ho Oh
Sang Soo Choi
Hyung-Joun Yoo
Assignee (at issue)
ELECTRONICS AND TELECOMMUNICATIONS 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.