Granted Patent
Utility
US 4,916,017 · App. 07/238,748
Sheet material
Inventors:
Haruo Nomi, Minoru Hatakeyama
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Aug 31, 1988
Inventors
Haruo Nomi
Minoru Hatakeyama
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.