Granted Patent
Utility
US 4,951,415 · App. 07/216,863
Culturing apparatus
Inventors:
Waichiro Kawarabayashi, Koichi Matsubara, Toshihiro Yoshioka, Hikaru Yamagata, Shigeru Takahashi, Yukimasa Hirata, Yoshiko Shirane
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Jul 7, 1988
Inventors
Waichiro Kawarabayashi
Koichi Matsubara
Toshihiro Yoshioka
Hikaru Yamagata
Shigeru Takahashi
Yukimasa Hirata
Yoshiko Shirane
Assignee (at issue)
Mitsui Petrochemical Industries, 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.