Granted Patent
Utility
US 6,178,227 · App. 09/293,091
Portable-type fluorescent X-ray analyzer
Inventor:
Masao Sato
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Apr 16, 1999
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.