Granted Patent
Utility
US 5,221,521 · App. 07/735,911
Sample liquid dilution system for analytical measurements
Inventors:
Yoshio Hashizume, Akio Kariyone, Ryuzo Hayashi
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Jul 25, 1991
Inventors
Yoshio Hashizume
Akio Kariyone
Ryuzo Hayashi
Assignee (at issue)
Kanzaki Paper Manufacturing 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.