Granted Patent
Utility
US 5,496,506 · App. 08/121,366
Process for removing fine particles
Inventor:
Junichi Sato
Patented Case
View Patent ↗
Granted: Mar 5, 1996
Filed: Sep 15, 1993
Inventor
Junichi Sato
Assignee (at issue)
SONY GROUP CORPORATION
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.