Granted Patent
Utility
US 5,320,944 · App. 07/965,612
Immunoassay using magnetic particle
Inventors:
Masahisa Okada, Yoshihiro Ashihara, Akira Yano, Masao Oishi, Katsuaki Yoshioka, Toshiomi Nakamura
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Oct 22, 1992
Inventors
Masahisa Okada
Yoshihiro Ashihara
Akira Yano
Masao Oishi
Katsuaki Yoshioka
Toshiomi Nakamura
Assignees (at issue)
FUJIREBIO INC.
NIPPON PAINT HOLDINGS CO., LTD.
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.