Granted Patent
Utility
US 5,673,041 · App. 08/518,692
Reflective mode ultrasonic touch sensitive switch
Inventors:
Joseph V. Chatigny, Kyung-Tae Park, Minoru Toda
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Aug 24, 1995
Inventors
Joseph V. Chatigny
Kyung-Tae Park
Minoru Toda
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.