Granted Patent
Utility
US 6,031,885 · App. 08/922,525
Displacement detecting apparatus
Inventors:
Shigeru Ishimoto, Toyohiko Matsuda
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Sep 3, 1997
Inventors
Shigeru Ishimoto
Toyohiko Matsuda
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.