Granted Patent
Utility
US 6,421,042 · App. 09/328,402
Coordinate position inputting/detecting device, a method for inputting/detecting the coordinate position, and a display board system
Inventors:
Katsuyuki Omura, Takao Inoue
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Jun 9, 1999
Inventors
Katsuyuki Omura
Takao Inoue
Assignee (at issue)
RICOH COMPANY, 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.