Granted Patent
Utility
US 5,507,873 · App. 08/465,607
Vertical boat
Inventors:
Yutaka Ishizuka, Yoshiyuki Watanabe, Tatsuo Nozawa, Shinzi Sawanobori, Tomio Kon
Patented Case
View Patent ↗
Granted: Apr 16, 1996
Filed: Jun 5, 1995
Inventors
Yutaka Ishizuka
Yoshiyuki Watanabe
Tatsuo Nozawa
Shinzi Sawanobori
Tomio Kon
Assignee (at issue)
Toshiba Ceramics 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.