Granted Patent
Utility
US 5,151,798 · App. 07/745,706
Hologram scale
Inventor:
Hiroyuki Okubo
Patented Case
View Patent ↗
Granted: Sep 29, 1992
Filed: Aug 16, 1991
Inventor
Hiroyuki Okubo
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.