Granted Patent
Utility
US 5,499,096 · App. 08/227,128
Optical instrument and measurement for measuring displacement of scale using different order diffraction of a diffraction grating
Inventor:
Hideaki Tamiya
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: Apr 13, 1994
Inventor
Hideaki Tamiya
Assignee (at issue)
Sony Magnescale 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.