Granted Patent
Utility
US 4,910,739 · App. 07/170,541
Adjustable aperture
Inventor:
Shinan-Chur S. Sheng
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Mar 21, 1988
Inventor
Shinan-Chur S. Sheng
Assignee (at issue)
Spectra-Physics, 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.