Granted Patent
Utility
US 6,490,807 · App. 09/649,861
Position detection apparatus
Inventors:
Masato Tanaka, Shigeru Ishimoto, Toyohiko Matsuda, Katsumi Kitamura
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Aug 28, 2000
Inventors
Masato Tanaka
Shigeru Ishimoto
Toyohiko Matsuda
Katsumi Kitamura
Assignee (at issue)
Sony Precision Technology Inc.
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.