Granted Patent
Utility
US 6,031,338 · App. 08/819,156
Ballast method and apparatus and coupling therefor
Inventors:
Doo Eui Yoon, Eun Chul Shin, Cheong Bon Han
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Mar 17, 1997
Inventors
Doo Eui Yoon
Eun Chul Shin
Cheong Bon Han
Assignees (at issue)
Lumatronix Manufacturing, Inc.
New Anthony, 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.