Granted Patent
Utility
US 5,478,677 · App. 08/375,204
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Inventors:
Wai Ming Choi, Ingo Schmidt
Patented Case
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Granted: Dec 26, 1995
Filed: Jan 18, 1995
Inventors
Wai Ming Choi
Ingo Schmidt
Assignee (at issue)
DARAMIC, LLC
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.