Granted Patent
Utility
US 5,597,067 · App. 08/333,983
Pushbutton switch
Inventor:
Masayuki Yoneyama
Patented Case
View Patent ↗
Granted: Jan 28, 1997
Filed: Nov 2, 1994
Inventor
Masayuki Yoneyama
Assignee (at issue)
Minebea Co., Ltd.
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.