Granted Patent
Utility
US 5,757,935 · App. 08/895,899
Audio listening device for the hearing impaired
Inventors:
Seong Hoon Kang, Kyeong Ok Kang
Patented Case
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Granted: May 26, 1998
Filed: Jul 17, 1997
Inventors
Seong Hoon Kang
Kyeong Ok Kang
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.