Granted Patent
Utility
US 5,457,725 · App. 08/220,598
Analyzing method for foreign matter states
Inventor:
Masao Sato
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Mar 31, 1994
Inventor
Masao Sato
Assignee (at issue)
SEIKO INSTRUMENTS 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.