Granted Patent
Utility
US 5,055,259 · App. 07/384,357
Bloodless blood typing training kit
Inventors:
Tsutomu Inoue, Kazuhiko Okamura, Naoto Kawamura, Hiroshi Tone, Rokuro Okamoto
Patented Case
View Patent ↗
Granted: Oct 8, 1991
Filed: Jul 24, 1989
Inventors
Tsutomu Inoue
Kazuhiko Okamura
Naoto Kawamura
Hiroshi Tone
Rokuro Okamoto
Assignee (at issue)
Sanraku Incorporated
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.